Do I ovulate?

So been doing opks for about a week and I know it's early started testing after af finished and started my fertile window yesterday but like I said been doing opks three invalided and three no surge however I took two today cheapie and clear blue digi and both have the faintest line on them where as the ones before today have had a clear line on them even the Invaladed ones I'm so confused do I ovulate or not or are the test playing silly buggers on me?