hello Fluufy
I personal think you’ll be fine.. Just dependant on how u feel really.
u can fly after yes- just not really Long hall. for the comfortable’ness!
Im an air Stewardess and having 3 weeks off work just for the activity involved in my job (carring bags, closing doors etc) but as a passanger ask your surgen but should be fine.
Where u having it done? and when is it? good luck if its close 
Hostie xxx