just need some affirmation about AF's after MC

Second period since miscarriage. Did anyone else experience intense cramping and weird premenstrual symptoms with their second (or third, fourth...) cycle? Just wondering if this is normal stuff. 
Getting much more intense cramping than I normally ever did. Had dark brown spotting for two days prior to bleed. Bleeding seems pretty heavy now (changing tampon very quickly). I also have this ache/cramp that keeps coming and going in the exact same spot above pelvic bone (and on my left side). 
Just hoping for some feedback from others whom have gone through this. Of course my mind goes to "did this MC affect my fertility?!)🙈. THANK YOU😘