Chances of pregnancy?

boyfriend and I had tons of sex this month with and without a condom period is due the 23rd, had some light brown spotting a couple of days ago. I have lower back pain after am orgasm and I never had pains after an orgasm I've been taking naps off and on which is very unusual for me, every time I sit or lay down in the afternoon I could and sometimes will fall asleep with zero troubles I've been super gassy and bloated I've been eating more and having cravings for pickles and I've been super emotional and teary eyed lately. Ugh.