Just started TTC 3rd baby but very confused!

[Momoftwo2011]

I just got off BC 7/16 to TTC my last period was July 4th and according to my ovulation calendar and CM I O'd sometime between 7/18-7/20. So I should be 6-8dpo. My husband and I had intercourse 7/17-7/20. AF has kind of been unpredictable so if I did not conceive I expect AF around 7/28 or 8/3. But I have been experiencing mood swings mild cramps(yesterday) diarrhea(today) fatigue and hot flashes. This is not my normal symptoms of AF coming. So I really feel like we were successful but I'm afraid it's just all in my head. I can't stand having to wait another week or two to test!! Has anyone else experienced anything similar to my situation? Or have any opinions or guesses on what I should expect? I really don't want to get my hopes up to high but it's hard not too!