Cramps, but not ovulating?

Help! I've been having cramps since yesterday and today all morning and I'm still having cramps this afternoon. It's nothing crazy, but I can feel them and they definitely bother me a little bit. Glow changed my cycle again. It says AF is due the 27th now instead of the 21st. First cycle off BC (got removed on April 4th). Have no had a positive opk yet. They get dark then light then dark then light. I've been testing in the morning afternoon and at night because I don't want to miss it. My last AF was last month. Started the 22nd and lasted 10 days. After I got my BC removed on April 4th I had cramping that night and the next day I had withdrawal bleed that lasted about 5 days... not understanding why I am having cramps if it's too early for me to be pregnant (right?) and I'm not getting a positive opk... I haven't even had EWCM yet. Just light amount of creamy white CM is all I have right now. My cervix feels like the tip of my nose and it's not in the middle it's more to the right. I can reach it with my index finger. I did take Walmart .88 pregnacy test last night and hcg strip this morning. Both negative.