TTC after DEPO


My last depo shot was in may 2021. I haven't had any bleeding at all since I stopped. I never had a period while I was on it either. I have been having unprotected sex for the past month. On the week of 11-5-2021 I had 3 days if light pink and light brown mucus spotting. It was never in my underwear it was only when I wiped. No cramps, boobs have been kinda sore but only on certain days which is weird lol. I read that implantation bleeding was kinda like that. I haven't taken a test yet. Just wanted some opinions first. I haven't had a period in about 7 years because of the depo so I don't have a last period day or anything.