Full Ferning & +OPK 7 DPO???

Hey everyone, I use the Maybe Baby Saliva Ovulation Predictor and opk's to pinpoint ovulation. A week and a half ago, I began having EWCM and increasing fern patterns on the saliva test, so I took some opk's and got a positive result last Monday. Last night, I felt the all-too-familiar round ligament pain in my left side while changing positions in bed, so it made me curious and I took another saliva test and opk today to see what would happen. I got a full ferning result:

And a very positive opk:

I am breastfeeding and have not had consistent cycles, but my luteal phase is a reliable 14 days after ovulation, meaning I should start AF next Monday. Is it too early to take a hpt? Or would my hormones be revving up for AF this early on? Can anyone shed some light on this for me???