HELP!

Today marks my 6th day since my period was expected and I just started. Meaning I started 5 days late. It's very heavy, a weird shade of red (dark red like if I had a cut on my arm and wiped it off) and my cramps have me laying on the floor crying. I called my husband crying begging him to home from the gym. I can barely leave the bathroom bc of diarrhea and every time a cramp intensifies I throw up bile. I've never had cramps this bad. Someone suggested that I may be miscarrying a chemical pregnancy but I never tested positive so idk. Any advice why it hurts so much worst than usual and what's wrong with me!?