Stresssed and upset

la

I’m 25 and my husband is 24 we have been tryin to conceive for 2 months now Taking prenatals and everything Last period was March 22 , i tested positive for ovulation on April 4 had a lot of sex before and after the date just for fun too estimated period was on april 19 I keep takin pregnancy test and keep coming up negative I’m so upset something wrong with me idk what to do