HSG test after miscarriage

Grace
Has anyone ever had an HSG test done after a miscarriage? Did it answer any questions about how your miscarriage occurred?
I've read that most women have the HSG done if they're having a hard time getting pregnant and to clear out the tubes. My dr suggested that I get it done to rule out any uterine issues that may have caused my miscarriage. 
I'm just frustrated with waiting... I had a miscarriage at 18 weeks on March 7th. After taking provera I got my period on May 13th. We are ready to try to conceive again but we need to wait after the test. 
Did anyone successfully get pregnant after the test and have a healthy baby? I'm so nervous about future pregnancies because we still don't know what caused my body to miscarry in second trimester :(