Help please!!

Brandi • 24, married and pregnant with my 2nd which is also my rainbow:)
I just started trying to conceive last month for baby number 2 (no symptoms with her, found out with missed period and was on bc pills). Didn't use any opks just kinda guessed by my periods and what 4 fertility apps said. All said I ovulated on the 26th. I had sex on 21st, 22nd, 23rd, 24th 26th and 28th of October. I have been a little constipated and gassy, bloated, and been having headaches (not the kind I normally get, I have chronic migraines). Bit what's been bothering me is every time I cough I have a sharp pain on my left pelvic area. I also have very irregular periods, so not sure when my next one is due. Any ideas what this could be?