Help!!!

So I am so confused and dont know what to think! My husband and i have been ttc for 3 years, one miscarriage of twins 2 years ago, and have just started going to a fertility clinic but she told me to take a few months off of medicine to see if my body would have a period on it's on. Well I had 2 my last one was July 31st. So I tested on Friday afternoon and it looked to be a vvvfl, even had a friend check it and she agreed, well I tested again the next morning with FMU and it was negative. But this morning I woke up feeling really nauseous. My only other possible symptoms is constipation and slightly sore breasts. What's your opinion? No rude comments please!!! I know I should test again in a few days and I know I need a blood test but I am about to go crazy. Just curious if anyone else has experienced the same