Effing confused man 🙂

Okay so this is all tmi. I got my first birth control shot on June first so it stopped being effective somewhere in the middle of September. But I haven’t gotten a period since. On the tenth (of November) I had unprotected sex with my man (he finished inside me). Exactly a week later (the seventeenth) I had dark light spotting on my panties. I’m still having a light flow of very dark somewhat globby brown blood. I’ve had light cramps and it’s nothing like what my period used to be. I was wondering if anyone has had the same experience? I’m going to take a pregnancy test here soon, just want to know what some of you ladies think. Thanks in advance ❤️