Confused about OPK
So I've been trying to conceive for a few months now and I was pregnant back in April which unfortunately ended in miscarriage at 6 weeks. I have had one period since but it was a lot later than my usual 33 day cycle so now im temping, checking cm and have started taking OPKs I got a very faint one on CD14 then darker CD15 and 16 but not fully positive I also hadn't had any rise in temp or ewcm however on CD18 I had ewcm and cramps in my left side but the OPK is a lot lighter than it had been the days previous! I'm so confused Im on CD19 now and my tummys a bit sore on and off on one side and I had some white stretchy cm (sorry tmi). Is there a chance I still ovulated without a very dark line of ewcm or am I ovulating now? I hate not knowing!! Help?