HELP !!!

So my fiancé and I have been actively been trying for a baby since our miscarriage in March . Here we are in August and nothing has happened . Well here is the kicker .... I had my period from July 31 to August 3. My predicted highest fertile week was August 10-17th . We did the deed before ovulation . Well here we are 7 days past ovulation . I’ve had crazy symptoms ,, crampy here and there , headache , INSANE APPETITE INCREASE, acne , and sensitive nipples. As of this day I took a pregnancy test and it was negative . Can someone please help on what I should do next ? Thanks