Miscarriage symptoms

Rowena • I`m 41 and have two children aged 9 and 14. I`m now remarried and my lovely husband is 32. We are expecting 4th of July
Hi there, I know this isn't the happiest topic but I really need to ask. When I had my two miscarriages earlier this year for around a week or two before I started to fully mis I had a bad ache down there. It was like I'd pulled a muscle inside my vagina!?  
I've had three periods since the miscarriages and three days before the bleeding starts I get the same pain.  Has anyone else had this? My Dr said it might be a fall in progesterone and if so they might give me progesterone tablets. 
Any info/advice/support gratefully received.  I have two kids age 8 and 14. Thanks