Call me silly...

Call me silly, but I find it super difficult to understand the ovulation and perfect-timing-to-get-pregnant ordeal. Lol. I get it, but up until I had my first son almost 5 years ago, my cycle was very irregular. Since then, it’s been just about 28-31 days. Normal, right? At age 16 I was DX with Endometriosis and PCOS. I now have a 4 year old and 2 year old. No ‘real’ issues TTC. We have had one MC since our 2nd child. But, cycle still typical. Reason for post: My last period was 12/13/17. Ovulated on 1/2/18. Obviously we have done the deed 😁 Still no signs of AF, but this time around since ovulating my cramps were very intense and still come and go; just mild cramping. Should I take a test? Or wait out this week and take one next week if AF doesn’t show up? 🤞🏼🤞🏼