This is my first month using OPKs and chatting my BBT. I got my first positive OPK Thursday evening at 9:45pm. This morning (Saturday) my BBT was up +0.13 Degrees Celsius. Glow is telling me tomorrow is 1 DPO and that this temp rise is ovulation. Is that correct? OPKs are from Thursday evening (positive) until Friday evening. I've posted Glow chart and Fertility Friend chart too. Still trying to understand it all! Thank you x