Advise needed: what do I ask for

Kirsty

So I’ve suffered with 3 chemical pregnancies and 3 miscarriages over the last 14 months. I have 2 healthy children already but I feel as though something isn’t quite right as to why this keeps happening. I want to go to my gp but I’m not sure what test to ask for doing etc. I know there going to tell me I’m overweight but I don’t think that’s the problem help me please