Ok ladies I wanted to give a suggestion if you're going to use OPK's next month! I used the first response ones they're the double line tests but it also came with one digital one to confirm yes or no if you're ovulating! They reason I suggest these is because I took a test (the day I was ovulating) and wasn't sure if it was positive or not. I almost didn't use the digital test because I didn't want to waste it because the line didn't look as dark as the control line, but I'm glad I did because I was actually ovulating! If I hadn't taken it I would have missed my chance! Just a suggestion 😃 I'll attach the test so you can see how you may not think it's positive!