It varies tremenously.
My personal experience (Dec last year) was horrendous - almost needing hospital admission for airway obstruction. I was jaundiced, and had an enlarged spleen. I guess I was acutely ill for about 6 weeks, and then unwell for a few months after that. The fact I kept on going all the time probably didn't help. I'd overdo things (like having a labour week with zero sleep) and would almost go back to square one - not with the sore throat, but just feeling like I didn't have the energy to move. Even now, almost a year later, every time I get a cold, I feel completely zonked out, and seem to suffer from swollen glands a lot more severely.
I really do sympathise... but hopefully you'll make a quickish recovery.
Don't do what I did. You really do need to get as much rest as possible.