I have had mono for 1-2 weeks. it wasnt bad and my symptoms are faint now. if i try to do too much too soon will my symptoms come back? get worse?

It takes time to heal: Listen to your body. Your symptoms will not come back but may take longer to recover.

Depends: The average young adult will be symptomatic for 2-3 wks and rarely 2-3 months. I would not advise a marathon run at this point but if f you feel well enough and you gradually build up your activities to match your stamina you should be fine.Remember to plan for 8-10 hours of sleep during this build up period. Failure to get enough sleep will set you back.