Hello. I've used this app before, just made a new account. I have 3 beautiful girls, ages 5, 3, and…

Hello. I've used this app before, just made a new account. I have 3 beautiful girls, ages 5, 3, and 1. I had a miscarriage on 10/15/15. Currently thinking I'm pregnant but I've had 3 bfn. 😞 Lmp was 6/6/16 so ovulation day should've been 6/20/16 but not sure if I did and unprotected sex was 6/22/16. Symptoms are bloating, constipation, sore/heavy/huge breasts, sore nipples, backaches, and pelvic cramps. Could any one tell me what is possibly going on?? Any advice or experience is welcome.