About a month back i took my GMAT and got a dismal 650.

I was scoring above the 650mark on an average in all the MGMATs and the GMAT Prep.On top of that I forgot to check my Quant score when the scores got displayed.I was so disappointed by the 650 that i did not even bother looking at it.
I saw my VA and it was 30,which is really poor as I was constantly hitting the 37-38 mark in all the prep tests.Now,judging by my score of overall 650 and VA 30 can someone here please tell me approximately how much I could have got in QA.A range would also help me a lot as I would then be able to figure out how badly i performed on Test day in QA.
I know its a very strange request,but would be of immense help to me.
Thanks!