I just feel like I'm lost, I don't know what to do with my life right now ! There's a lot going on I just can figured out what to do ! And my friends just don't get me and I'm tired of trying to make them realized what I'm going through because none of them is as lost as I am and I think they don't know what to tell me... any advice is welcome !

Can you say what age you are, the advice you receive will be geared towards your age.

I just realized I didn't tell much in my question so Im just going to fill it : Im 18, my parents are divorced, my sister is pregnant (she is 19 and the really big problem is that my mom is like REALLY religious and we went to a catholic school ) and we don't get along, I finished school last year and I am not in university yet because Im not sure what to study and my mother is really angry with me all the time ! I try to be a good daughter and she is so unfair with me ! I use to go out every time I could without telling my mom or returning to the house and now I don't go out at all and she doesn't see what I do for her... I just want to leave my house for a while and I would but my sister is giving birth in 3 weeks and I have to help... I don't like asking for help because I know my problems are nothing compared to other people's problem but now I just need some advice before I do something I'll regret.

Pain is pain no matter where it comes from, your problem is very real as it is effecting you in a negative way.

Your mother probably got quite a shock when your sister became pregnant and is still reeling from that, lashing out at those closest to the situation, try talking to her again, make her a cup of tea and sit her down and ask what can you do to help her, if you are already doing stuff and she's still angry with you, ask her what can you do.

What about work experience for you while you decide what your going to do, what do you like to do, what is/ was your passion?

If you can't think of anything just yet getting out and about meeting other people will give you some down time, plan a night out with your friends and let your mother know what time you will be back, and then be back at that time, even if its only the cinema.
Get out for some exercise, no one in the house can wrong you for going for a walk, it will help clear your head and give you some breathing space.

I understand you love your sister and want to help, however you do not have to suffer for your sisters actions, you can be a good sister you can be her friend, but you are not responsible for her happiness or well being.

I'm throwing this out there as an option, asking a 3rd party to talk to your mother, either a someone from your parish, a priest, or your dad, to try and ease the transition for your family, things are going to change.

This is not a slight on you, only trying to see where your mother is coming from, she has two adult daughters living at home, one not yet sure of her future, the other heavily pregnant, she is probably frustrated at life too and is taking to heart the current situation.

I urge you to go to your doctor if this situation is getting too much for you, there is no shame in asking for help or saying you can't cope, your mental and emotional health is as important as your physical health.

I'll try to talk to my mom and hopefully everething is going to be better, thanks!. and I just have one more question... my boyfriend told me that he had a connection with a girl that he knew for 10 days because they had sex like 8 of the 10 days and that he wish to have that with me but he can't because I am not going to risk getting pregnant, at least not now... the thing is I don't understand how he can have a stronger connection with that girl than me!.

He's not a good boyfriend if he just wants sex, easy hassel free sex, or a sex buddy.

Think about it, he had a connection with someone because he had sex with her and only knew her for 10 days! Who does he think he's kidding!! more like he got his rocks off and left her in the cold, he does not have a stronger connection with her , the only deep meanifull connection he has is with his penis, don't be fooled because your feeling low that sex equates love.

You have enough on your plate right now without a horney guy just wanting sex, kick him to the curb.

So I did what you told me and he told me that he is going to change and so far everything is better with him! So I hope everything stays that way otherwise Im done with him... Thanks for everything!!