Ovulating? HELP!

Olanda

Based on my <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a>, I’m on my fertile week and my peek day is today. Based on my BBT chart, I believe I’ve ovulated, but I’ve been taking OPK tests and they come back negative.

Yesterday, around 4pm I started to get lower right back ache. When I got home, around 6pm I began getting cramps on my lower right abdomen. Then I had cramps on my middle lower abdomen and lower right abdomen for the rest of the night. My boyfriend and I BD last night and it wasn’t painful but I did feel a bit discomfort on my lower abdomen.

I did some research today and ovulation pain could be normal for some women. Could I be possibly be ovulation even though the OPK are negative?