I'd say rest up until you have felt better for an extended period of time.

No alcohol for sure. Not sure about smoking (marijuana, I assume) as it can have a calming effect which may help the healing process but it could do harm as well.

I know it will be hard to rest and get better. At 17 I would be doing the same as you. Back to it as soon as I felt better.

I've had symptoms for over a year now due to the same pattern of starting to feel better and then doing too much.

One summer of just rest and recovery could save you a lifetime of feeling like crap.