So confused

PD

I’m still trying to figure out if my cycles will be back to normal after my ectopic in February last month I had t the normal 22nd of the month. According to glow I should of started on the 18th so I have been testing since then. I have gotten allllll negatives. This morning I took a test and at the 5 minute mark noticed it was positive I got really lightheaded and sat down because just yesterday it was negative. I couldn’t believe it so with the same pee (because I pee in the cup to make it easier) I tested two more times and those were both negative. I just don’t understand what is going on. Has this ever happened to anyone?