Okay so I am about 2 weeks late on my period. I ended up in the hospital last Monday for really bad chest paid and they took blood X-rays everything to see what was going on and they took a pregnancy test as well and it came back negative. Well I ended up having a ulcer begin from stress so bad lately. I still have not got my period and I'm kind of wondering what's wrong

Stress can not only cause an ulcer, but it can cause a missed period as well.

I've never completely missed one though but I've been super stressed its caused an ulcer and I think I'm stressing myself out more by worrying about this

Yeah, if your test at the hospital was negative, you should stop worrying.

I guess I'm worrying because Ive never been late and I've been reading online and everyone's saying that even if that test is negative you can still be pregnant

It's possible that the test was taken too early, so pregnancy is still a possibility. It depends on what kind of test the hospital took, whether it was qualitative or quantitative. But in the end, stress itself can cause a missed period.

I don know the difference all I know is they took a urine sample from me and blood

Qualitative is either a positive or negative result. Quantitative tells the doctor how much Hcg (pregnancy hormone) is in the urine or blood. They wouldn't tell you which test they took.

Again, in the end, stress can cause a missed period. Many women who are regular even miss a period at least once in their lives for unknown reasons.