Hi there, thank you for posting your question on Ehealthforum. This is not intended as a substitute to visiting your own doctor.
You are describing classical erectile dysfunction brought on by Performance Anxiety or watching yourself trying to get an erection. You have three choices now. You can do any one or all of them.
(1) Do nothing and wait for it to right itself. Remember, most erectile dysfunction goes away of its own accord eventually.
(2) Go to a doctor and get a prescription for something like Cialis 20mg. This should kick-start the system for you such that you quickly regain your confidence.
(3) Go to a Sex Councillor and learn how to get round Performance Anxiety through behavioural techniques. These typically involve stop/start erection management and eventually having intercourse with the lady on top doing all the work while you just lie there doing nothing. If you are not expected to perform then you cannot have any performance anxiety. A sense of humour too of course always helps.
I think you need tell your new girl about your problem. It is less threatening when its out in the open. Anyway you are going to get better.
I hope you found this of some help.
Dr Andrew Rynne.
www.andrewrynne.com