Thinking miscarriage

I am roughly 5 weeks and started bleeding heavily like I am on my period with cramps this afternoon around noon. Doctors office wants me to get hcg done tomorrow to check levels and compare to last hcg I had last week. To me, with this constant bright red blood it’s an obvious miscarriage but the lady at doctors wouldn’t say until bloodwork. I’m not soaking a pad but definitely have spots on it. Every time I wipe the toilet paper has blood all over it. Wondering if anyone has ever had this happen and it not end up being a miscarriage. Also, any advice as to what the process of miscarriage looks like this early? I’m sure I’ll find out more tomorrow, but I’m just obviously dismayed. Thanks.