Should I call thr Dr.

Katy
So we have been TTC since May. My last period was May 1st. I've taken a mess of pregnancy tests and they have all come back negative. I saw my obgyn Jun 6th. She said might be hormones delaying my period and to wait a couple of days and test. Negatives. I keep waiting and every couple of days I test. But they have all come back negative. Now over 30 days late I'm getting a lot of cramping. Could have sworn it was my period. But nothing has happened. no spotting and I test 2 days ago and it was negative. I'm starting to get concerned. Is it time to call the Dr. Or should I wait.