Am I ovulating ? Advice please !

I took the two stick ones earlier this morning, one at 5am when I was cramping a lot on my right side and in the middle a little. Then took another stick one in the after noon, morning one on bottom afternoon on top then I tried a dollar tree opk test just now and it’s negative. Any idea what’s happening ? Different sensitivity, or I’m not ovulating now ? The stick test are positive, a little darker then the control line, picture is hard to tell, has anyone had this happen before? I been cramping the last couple of days but not so much today.