i recently bought nightfall and forgot to merge it with my prophicies account does any1 know if there is a way to merge them still ? or sumthing that like that?
Sorry, but you're stuck with 2 separate accounts. That's why there's a red message confirming that you're making a separate account rather than merging. ANet won't help you merge the accounts.
You can try contacting guildwars.com support and tell them of your error to see if they will delete the new account so you can get one merged. Really you do not want 2 accounts.
ANet won't help you once you've bought GW from them. Many people have been unfortunate enough to have done the same thing and none has been merged by ANet.