Try this site, it might give you the information you need, failing that, why dont you get in touch with your own GP and ask him does he know of any surgery's that have Polish speaking GP's - You really didnt need to come to a forum, Google is your friend :0)
Dr S Wozniak
Doctors (Hospitals & Medical Establishments) serving Birmingham area
61 Stevens Avenue, Birmingham, West Midlands, B32 3SD
Tel: 0121-427 6174
ukcities.co.uk/Birmingham/Health/General_Practitioners/