adderall and pregnancy

Ok I'm in a dilemma here. I want to want to start TTC again and I'm prescribed 10mg adderallXR (time release). I keep hearing mixed reactions. I am in grad school and I really need it to focus. I had a miscarriage a few months ago very early at 5 wks. I'm really not sure adderall caused this bc my dosage is low. I had a baby girl 3 yrs ago and when I found out I had been partying like crazy (obviously stopped the day I missed my period and found out). So given that I didn't miscarry bc of that, it's hard for me to believe that 10mg of adderall could cause a miscarriage, but I could be wrong.
My bf also drinks a lot and is overweight and I've heard that that can cause MC too. He won't go for generating testing though.
Given my situation do you think adderall 10mg is likely to cause miscarriage? Any of you been pregnant on it?