Sadly, doctors don't know much about sex toys (or about sexuality, from my experiences. I'm a nurse.)

If sexual play is allowed during your first trimester, then gentle use of toys would probably be OK. However, if it were me, and I had had several miscarriages in a row and didn't want to lose an other pregnancy, I'd probably be very careful.

Do talk to your OB about what you can do to save the pregnancy. Did you have a progesterone problem? Was is physiological? In the practices where I have worked, 2 or 3 miscarriages in a row is considered a "Chronic Miscarriage" and investigations will be done to figure out why the woman cannot carry the pregnancy.

First trimester miscarriages, if they happen one after an other is often linked to a progesterone issue and many OBs will prescribe a progesterone supplement for the entire first trimester. If the miscarriage was found to be due to a different issue, it will be handled differently.

I hope things work out well for you this time.

EDIT: Never Mind. I thought I read that you had HAD miscarriages. In a healthy pregnancy, with no history of miscarriage, gentle use of toys are OK most of the time. I never used toys during my pregnancies, as I didn't use them back then. But, I certainly had sex.

It's pretty hard, nearly impossible to cause a miscarriage. I'd stay away from electrical stimulation toys, but regular sex toys are probably OK with a low risk pregnancy.