Brie-I find the Wondfo opks to be confusing, but I still use them because they are so inexpensive. I have been finding the line darkness and thickness is variable across the two lines. Whichever looks the closest to positive, I take as a positive. I also know which one is positive because the next day, I'll get a clear negative. My af still comes every month, so I know I'm O-ing. I just don't get clear positives.
Welcome back, JJDreams. I've never taken clomid, so I can't offer any advice on that.