Period and pregnancy symptoms

Hi! I had my period this month on 11-15. Hubby and I have been BD about every other day this month beside the week of my period. The app says I'm due to ovulate starting the 30. The thing I'm dumbfounded about is, I've been having very sore breast, slight cramps, sever back pain, heart burn. A little diarrhea the past two days. I tested a few days ago but got what I thought was BFN, but I don't understand why I'm having this symptoms. Should I test again or wait 10-12 days DPO? Should I call my doctor because of these persisting symptoms? I need advice!