Miscarriage 💔

Has anyone had a miscarriage at 4 week and 2 days? Feel so down and hurt... I mean I’m getting bad cramps really painful my question is at this stage I won’t pass anything because theirs no baby? Will it just be a heavy peroid? I feel weak and a lot of pain they did blood test and said theirs no pregnancy and it might be a early mc.. my cervix was closed and I had bleeding in my uterus as dr checked? She also did hcg bllod test and it came back no pregnancy even tho I did a clear blue digital on my peroid day which was Monday.. feel lost confused how long do u usually bleed heavy and painful? And how would u know ur miscarriage is over