Clomid Advice

Okay ladies, my husband and I have been trying to conceive since last March. I have been on Progesterone since May and having been using Preseed since June. This month I started Clomid 50mg cycle days 3-7. My cycles follow exactly as my Glow calendar shows with my period starting within the same hour of each day each month so I figured ovulation would be pretty close to accurate according to my calendar once I started the Clomid. I should have ovulated today (22nd) according to my calendar but according to my tests I would have ovulated on the 17th. I am aware of evaporation lines. The first three tests were that dark 3 minutes from testing but were slightly lighter than the test line. This is my first experience with ovulation tests so any advice welcome. The top 3 tests are from the 17th and 18th, the fourth test is from yesterday and the 5th is from today. All tests were taken at the same time of the day. What do you think?