Seeking ovulation help

Erica
So last period was from 10/11-10/15. I have been off birth control since August  to get my body natural and I started having cramping the right side of my pelvis and watery cm about two days ago. slight pain pain/ sensitivity in breasts also. Is this ovulation? how long does ovulation last? I took a first response ovulation test yesterday and a line appeared, not darker than the other line tho. does this mean I'm fertile but havnt hit my LH surge yet? How do I get glow to tell me when I'm ovulating? I don't have any green circles on my calendar. Another app told me I would have my highest ov day today but I'm not sure how I know for sure!
Thanks for the help!