Advice?

Me and my new boyfriend have had sex several times the past few weeks, with and without a condom. For the pst week I've had a migraine that has lasted days and a constant uneasy nausea, it hasn't been really noticeable, just feels like I'm a bit car sick. My period is usually regular every month (it's been 5 years since I started) it normally started early first thing in the morning (usually wakes me up before I normally get up). I was suppose to start my period on Friday, so I'm officially 2 days late and since I didn't start it this morning I'm assuming that I'm not going to start it today. With my normal pms symptoms my boobs start to get sore and I get cranky, which has been what's going on. I've also been having sharp muscle pains in my stomach, which isn't completely non-normal for me, I have IBS. So I was wondering if I should continue to watch closely on this, maybe tell my mom, or should I just expect something like this. Any advice will help