Cant log in

I’m not sure whether this is a common problem or not but, I can’t seem to log in even though I’ve verified my account. I type on my email and password and are then told that ‘‘user not found, or wrong password’’. I know these to be correct because I used them ten minutes ago to create the account. I don’t know whether it takes time or not to set up the account or quite what. Any feed back would be most appreciated.