Got a positive opk on cycle day 7....

Kimberly • Ttc 🌈 after Fullterm loss at 39.5 week's in January....

So I took a opk today it was postive even Glow's opk analyzer put it as a +... I am just wondering if that is normal. So according to this app my fertile week don't start until 17th and on other app it says it starts on 15th. Should I baby dance just to cover my basis. My ovualtion day isn't supposed to be until later next week so am confused. Tia any info