Sorry if this is a little long.  I am 23 years old and finishing up my last semester of school.  I have been on the pill since I was 16 years old.  The bc I am on has made me had shorter periods (like 2-3 days) with two of those days having heavier bleeding.  I last had one of my regular periods around January 27th.  That same week I started an antibiotic for strep throat for a week.  Then February 8th and 9th I took diflucan for a yeast infection from the antibiotics. I wasn't even thinking and on the 8th and 9th I also had sex a couple times just using the pull out method.  My period for February (around the 25th) was just 2 days of VERY light spotting at its normal time but there was no need for even a panty liner or tampon which is unusual.  Starting around March 15th I have just felt crappy.  Nausea almost all day every day.  Headaches like crazy, slight abdominal pain, feeling like I need to sleep all of the time (and I have never been able to take naps), lower back pain, burping all day I feel like, and feeling really bloated.  I also had increased discharge but haven't noticed it as much this week.  I've still been taking my birth control and my period for march was just a few days ago and was the same as for February. Just 2 days of VERY light brownish spotting- not enough to wear anything. I took a home pregnancy test on Saturday the 23 and it was negative and I just took one this morning and it was negative.  I just don't feel right though.  I tried to get into the doctor this week but they had no appointments and I am not sure when I can go because I don't have my schedule for the next couple weeks yet. Does anyone have any advice or been through this?  I also go to an endocrinologist because PCOS runs in my family and have some hormone imbalance. Could that cause a false negative?