Just two days ago I noticed heavy bleeding and was sent to er there the doc told me I might be miscarrying she wasn't sure until I had additional testing done-hcg levels I passed something and took a picture it is a little graphic but I wanted to know how many week does a 3-4weel embryo look or is it just a tissue passing along during the process. Keep in mind I had no idea I was pregnant and only 20 yrs pld