Shocked

Well I knew my cycle was off so I decided to do opks this month. Well this app has been wicked off apparently. This morning I took my opk (been taking them in the mornings at 7am) and it was negative. Well this morning I had some cramping which I get when I ovulate. So tonight I tested and got a smile. When I ejected the stick the lines were much darker than this morning. Can wait to keep testing and see what’s up. The app says I’m supposed to ovulate on the 13th.