proof of pregnancy?

My baby fathers just stole my ultrasound pictures and those were the only proof I had of pregnancy since my old doctor won't answer the phone for my information.. and when the do answer they'll transfer me to someone and they won't answer and I'll leave my info and they still won't call back ... so I was just gonna take my ultrasound pictures since the new doctors want proof of pregnancy and apparently won't give me a pregnancy test ... and idk what to do I have old pregnancy test but that's no really proof it's mine... I'm currently 6 months pregnant... I told him to enjoy those little pictures because that's all he'll ever have of him and plus he won't ever see him and he knows he won't... 
but now I just need to know what can I do for proof of pregnancy?