Cramps??

Hey everyone. Just wondering about some cramping today. I am on cycle day 17. Af is due on 29th or 30th... A couple days ago I had some slight cramps which I figured were due to ovulation. I'm not sure when I ovulated because these opks have been extremely confusing for me. (It's my first month using them & first month actually ttc) I am new to all of this and was wondering if anyone knew what this could be? It almost feels like period cramps but not as painful! Anyone know if it a good sign? Thanks for the help! And good luck to everyone!! :)