I have had unprotected sex with my partner and I'm now suffering from heart bur, indigestion, head aches, large appitite and small lumps which are very noticeable and rather firm around my nipple I am 17 years old and my periods a mega irregular I took a pregnancy test and it came back negotive but I am not sure if I just took it to soon or not please help me

First of all, I am kind of going through the same thing as you are. Ok how long after your period did you wait before you tested. It is a possibility that you could be pregnant. All I can say is give it a few more days to a week and then test again. Good luck either way.