Quick summary; Irregular, history of ovarian cysts, unprotected sex,
I have recently have noticed an increase in vaginal discharge(kind of similar to raw egg white), nipples(only nipples) are tender to the touch, in the center of my abdomen it feels sore/bruised, nauseous, and worst of all macaroni n chz (my fave) made me want to gag. I don't think I can get pregnant, however to many of these are symptoms of pregnancy and nothing like my normal yet irregular pms. Someone please help!

Is there a specific reason you don't think you can get pregnant? It has been known to happen when someone has been told they can't have children that they do indeed become pregnant.
Why not try a pregnancy test? If it is negative, give it another week or so and try another test if you are still feeling possible symptoms... or you can see your doctor if they continue.

I tried once before with a long-term boyfriend for about 6 months. Shortly after we ended the relationship his new girlfriend became pregnant. Also, unfortunately, I have been so caught up that on a few occasions I didn't make sure protection was used, thankfully nothing resulted from it.

You may have just gotten lucky and dodged a bullet.

Take a pregnancy test. PMS symptoms also mimic pregnancy 'symptoms'. One thing to know, your PMS symptoms may change over time and you won't always experience the same thing.

If you're still unsure, call your doctor or local Planned Parenthood.