My hormones are making me crazy

Arely • No more babies for us. #FamilyOf5
Someone help!!! I miscarried April 22nd and have been TTC since,havent had AF this month.. I took 2 test on the 25th got BFN and then the 26th took a digital and got pregnant. Went to the doctors today,urine was negative and she did a vaginal ultrasound and didnt see anything so she sent me to do blood work...now im impatiently waiting for the results....how would i even get a false positive is that common?? Im losing it right now..