Help me

So I’m on my second to last day ovulating (March 15) and in my past ovulations I’ve never had any symptoms like I’m having now. I’m fatigued and I have back pain my breast’s are now becoming tender. Is it normal for your breasts to get tender at the end of your ovulation cycle? Me and my boyfriend have been having unprotected sex since the end of my period (March 1st). So could it possibly be pregnancy symptoms or just ovulation symtomps. Again I’ve just never had these symptoms before when ovulating. Just want some help understanding better.