I'm currently on synthroid (50mcg) and had a partial thyroidectomy last June. I have been seeing an endo and my levels are where she would like them giving my activity level and all my symptoms of thyroid levels being off have gone away. My boyfriend and I recently have had sex multiple times during my fertile week and when my cycle was supposed to start I believe it came but it only was a day. I have taken home pregnancy tests (2 to be exact- cycle was supposed to start on August 1...it came and was gone by aug 2) but am having back pain, cramping, nausea, fatigue 24/7, shortness of breath when I workout (I work out daily at a high intensity) and bloating to the point my pants don't fit anymore. Do I need to wait to do another test or get a blood test to check for pregnancy? I've been regular since beginning my synthroid and being off birth control.