Did I miss something?

3rd month ttc and 1st month using opk but did I miss my 'surge'? I still don't think my cycle is back on track after being on the pill for 12 yrs so I'm not 100% sure when I'm meant to ovulate but it should be around now... I didn't test on Sat because cm wasn't yet clear and I just didn't feel like I was close to being fertile (and all previous opk were very negative!), but then I got those 3 faint lines on Sun and thought "yay, I'll ovulate soon!" Tested twice today (one am and one pm) and now nothing. See pic. What are your thoughts? Could Sat have been the day and I missed it? Or are these things just super unreliable. Thanks ladies!