When Should I test

Ok, let's try this again. lol. I'm getting used to this site and posting and learning on the different terms.

Hello! My husband and I are TTC for our first. I went off my BC in January and I have had abnormal periods every since. I had been on the pill for more than 10 years. My first cycle off the pill was 72 days, then 60. I have talked to my OBGYN and she believes that my body is trying to normalize and I have an appointment to talk to her in a couple months again. During my third cycle I started tracking my bbt and on day 32 I took an ovulation test which said I was ovulating. YAY! This was a big step for me, lol. On day 51 of my cycle, I noticed light bleeding, very light. Almost nonexistent, haven't needed anything more than a liner and might only get a few drops each day. This has continued to today, day 52. I have also had light cramping, almost a pressure feeling rather than pain. I read about implantation bleeding and wasn't sure if this could be that or if I'm having a very light period. Either way, I'm not sure when I should test. Any and all advice would be welcome. Thank you, ladies!