Question for glow

I am 11 days late for my period now which was suppose to start on april 1st cycle day 44 today and still no AF. For the past two days i have been getting notifications saying from my data i should have intercourse as i have a higher chance of pregnancy? Now im confused because i am sure i have past my ovulation date & even if i did ovulate late in my cycle i would have noticed the changes although i have been BDing still every other day i have also taken test today and dissapointed as i got a BFN should i test again??? Its heartbreaking everytime i see a BFN...plz God help me plzz