CD 13 af like cramps?

Currently I'm on CD13 and am having cramps like I'm about to get my period. Glow says I will ovulate in 2 days, but I have irregular cycles (last month I was on CD62 when af came) and usually I get sore breasts 2 days before ovulation and pain just on one side, never like this before. Any idea what it could mean? I do chart bbt but I know you can't confirm ovulation until after it happens with that and I've been having creamy cm