To this day I have no cramps are bleeding.
I had went to the Dr. in October because I had been bleeding for 14 days straight. They check my hcg levels they were high indicating I was pregnant, i also took a urine preg test at the DR. office, it was positive. My pregnancy was growing in my fallopian tube (8 weeks along) and had ruptured causing all the bleeding ( I also had a history of miscariages- one 5 years ago). Are you bleeding? Do you have lower abdominal pain or back pain? If so you preg might have attached where it wasn't supposed to.
Could be a blighted ovum. This is where the gestation sac develops in the absence of an embryo. It's likely that you would be slightly smaller than expected for gestation.
Microscopic studies have shown that imperfect sperm are still able to fertilise a normal or defective ovum, which then results in the blighted ovum.
If that's what it is then it's unlikely to reoccur in future pregnancies. However the fact that you've had 4 miscarriages means you should have further investigations.