I have submitted my results from a BTEC National Diploma in Business. ?

But unfortunately I didnt get the grades required (DMM) and now I have dropped to a National Diploma Certificate in which I achieved DM grade. I cant sleep and im anxious cause im not sure if Hertfordshire Uni will accept this, What do I do know and how many points will a uni let you off?? Term starts on the 29th September....and I have not heard anything? If you have been in a similar situaton please let me know