I have hayfever and are booked for surgery in 3 days will it still be ok to have it done ?

No, cancel: It is better to cancel the surgery and reschedule it latter when you are completely recovered. Find out what type of hay fever you have, allergic or non allergic.

Talk to Surgeon: You should ask your surgeon about the problems this may cause, it may not be a problem at all, or it may be a problem depending on the type of surgery you are about to have.