I had sex (using protection) mid-December.  2 weeks later I got my period.  I havnotch had my period since. I had experienced nausea, fatigue & weight gain since january 1st.  I had 3 neg. take home tests and 1 negative dr. Urine tests (at what would have been 14 weeks, or mid march).  I eevent as as far as getting an ultrasound, where they found nothing, but did comment that my bladder was too full and I could not seem to empty it (nerves). I have since noticed that my breasts are enlarged.  I don't know what is wrong with me and I'm so nervous I'm pregant.  My dr tested my thyroid hasn't doesn't want to do more tests ato this time.  Please ease my mind that I'm not pregnant and I shouldn't feel I am!!!