My period is irregular and I've had sex before.
One night me && this boy were having sex and he
Didn't use a condom but he didn't . Can I still get
Pregnant if my period is irregular and he didn't .
But isn't there pre- before? I'm 18

Yes, you can still get pregnant. If you are not ready for parenthood, please use some form of protection.

So I should buy a pregnancy test just to make sure if I am?
This was like 2 months ago?
After we had sex maybe like 2weeks later I started getting sick when
I woke up. But it only lasted a couple days.
And now I'm hungry like all the time even after I eat?
&& I'm getting like pains in my stomach sometimes.

Am I just freaking myself out or am I really pregnant?

my period is irregular and i've had sex before.
one night me && this boy were having sex and he
didnt use a condom but he didnt . can i still get
pregnant if my period is irregular and he didnt .
but isnt there pre- before? i'm 18
Yes I'm almost positive you can get pregnant, the irereularity I don't believe has any effect on your ability to get pregnant and I'm not sure about the pre but can you really trust a guy to pull completely out if he does finish?

Its possible your pregnant and its also possible your just freaking yourself out and looking into things too much there's a lot of things that can cause symptoms but definitely get a pregnancy test or 2 to be sure