OPK Help


I started taking these at CD 6. I have a semi short cycle and didn’t want to miss O day. The very last opk and hcg test are both from today (CD 15). I took the hcg test just for shits and giggles but I know it’s negative lol. Last month’s period was super long but very light. Has anyone had this happen before where you just don’t get a positive opk? It doesn’t look like I’ve peaked yet. I usually get a strong positive CD 13 or 14.