anyone else had bad experience after mmr booster jab?!?

Hi, 

One of my boys 3.5 years has just had mmr booster jab a about 4 week's ago, and since a few days after

he has gone backwards with what was moving forward eggs, headbanging, very controlling behavior (if you don't sit in right place he has meltdown) very aggressive biting, hitting, smashing toys against walls. Having meltdowns outside of Home aswell. 

I mean his behaviour had no where became 'perfect' but he has had a lot of early intervention speech therapy/behaviour theory/play early years funding at nursery but since just before his third birthday things have got a lot better, less  meltdowns, msuch more speech, less angry (still more than average but we was I'm really bad place before so lots of improvement) 

Anyway point is since the jabs it's gone back to how was before he has never slept great n that never helps on melatonin only has 4 hour stretches most of time. But just don't know what to do! Like it's all Been magnified again. 

He is sooo strong for his age and it's very hard to have any control :-( 

Any advise welcome 

Stacey xxx