First AF after MC or IB?

Melody • ❤️ God lover. Jesus follower. Wife & mother. ❤️
Idk why but it's kinda stressing me out that I don't know what my body is doing. For three days now I've had spotting, which has consisted of mainly brown but nothing bright red. I have cramps but they light and pinchy like & what seems like pressure in the pelvic area. Is it my AF or IB? I O'd somewhere around July 4.