Unknown Ovulation - FRER - Is the line getting darker???

Hello! I got two very light positive tests yesterday. One with FMU and one mid day. Today I think the line is darker but not sure. I took two tests today and got another two positives. The first picture is from today and the second is from yesterday. Does today’s seem darker? Or should I start to get worried? No idea when I ovulated because my thyroid has been off and my periods have been late for 6-7 months.