Prolonged sitting

I'm 19M and had l4-l5 disc herniation..Did microdiscetomony..The pain was immediately gone and don't have any sciatica pain, only mussle pain.I'm in day 8...I'm attending College and have to return soon as possible...it's 7 hours of classes...I can stand up every hours and walk every 2 hours...and also have a lunch break when I can lay for 15 minutes,since I stay in hostel...my surgeon said I can return after 2 weeks of surgery... I don't have pain while sitting...will i reherniate if I sit that long daily,this soon?