Irregular periods months after miscarriage

I had a miscarriage in September. My cycles had always been normal up to that point, but everything's really screwy now. I haven't changed the way I'm eating or anything, so I don't know what this is about. It doesn't even seem like I'm ovulating anymore, but isn't that not possible if I'm still getting my period? I don't even know anymore. I just want to get my BFP, but I can't do that if I can't track anything accurately. It's just so frustrating. Can anyone offer some advice, please?