Advice

Allee
I need help I was supposed to get my period on June 29th it's July 5th and nothing I don't have any signs that I'm pregnant except two days ago I got really sick to my stomach I didn't throw up but came very close a couple of times but am fine now I took a test on the 30th but it came back negative. I have been taking fertilaid for almost a month could that have something to do with my period being late