Over thinking

Hi i recently miscarried my baby at 5 months had him natural birth & i had sexual intercourse 3 weeks after. Ever simce them my feet have been getting swollen and my ankles hurt I cant walk for 2 min without complaining about my feet. Ive been getting more hungry & more moodier and more tired lately. I actually keep getting nauseas with my favorite food pizza & I throw up afterwards. My husband has been getting nauseas with his favoritr breakfast also. Negative pregmancy test come up and i started my period. I dont know if its implantation bleeding or my period since its actually heavy. Help please 😔