Deliberately hit by a driver, what next?

Hi all

I was deliberately hit by a driver on Sunday who swerved into me.  I was in the 2nd lane going straight ahead with the 1st lane for turning left.  After honking his horn and attempting a few dodgy but failed attempts to overtake he moved slightly into the 3rd lane and swerved into me, traffic was busy as  we were entering a town centre. 

I took photos as he drove away (he didn't stop), I managed to stay upright.  After I stopped 2 witnesses approached me and told me they had seen him deliberately drive into me, I got their details.

I called 101 once home and told them what happened, they put an observation out on his car and told me to report to a police station on Monday.  

I went to the 'police station' spoke to a non-police officer who filled in a traffic form, told me to go to the doctors as it would help them and was told an officer wold be in touch to take a statement.

I went to the doctors, who weren't interested once I told them it was a bruise and some whiplash and said it is the police's responsibility to give me a medical for prosecution purposes. 

I am yet to hear from the officer- does any one know how long I should be waited until I kick up a fuss?  Surely the sooner the better?  Will they visit the driver without my statement, to look at any damage to his car? Is there anything else I should be doing?

Thanks