Help please?

Nicole

So I had a natural miscarriage 5 weeks ago in July, I bled for a week and then check that my hcg levels went down to 24 a few days later, everything seem to be normal but for the past 2 weeks I've been feeling really dizzy and nauseous the whole day and also I've been feeling a twinging pain in my uterus and some back pain as well. Are this symptoms of AF? How long did it took for you to get your AF? Can this be pregnancy symptoms?