very quick pip medical date

I sent my pip 2 form in last week and didn't send any supporting evidence with it as I had requested my doctors records, yesterday I received a letter from ATOSsaying they wer going to write and get supporting evidence from ether my drs or consultant ? , today I got a call from my doctors saying my records are ready to collect, so I rang ATOS to see if they wanted the records they said they didn't want it I had to send it to DWP IN WOLVERHAMPTON, but whilst I was on the fone to ATOS they said I have been sent a appointment for an medical exam with ATOS for 26th march !!!! this is very quick is it not ?? considering I only put my claim in last week i??? exam is in warrington which is miles away , don't know how im going to get there ??
now im certain I have been reported for working by a silly ex daughter in law who is causing lots of trouble for my family even though I haven't and that is why its being rushed through ,
she hates the thought I have a car and she hasn't !!
im on indefinite top rate DLA for care and mobility and have been for over 10 years and didn't think I would be assessed till at least oct 2015 ????
I feel sick with worry now