Energy Prescription/immune System/medical/gp

Nothingsaconquinidence Says:

I've had meningitis and septacemia a month ago, also my body went I to spetic shock. I was on life support for 3 days, I'm not out and back at school but a whole day wipes me out and I come home and sleep. Then I can't sleep of a night properly and end up more tired. Is there any such tablet if I see my GP that will boost my energy levels so I stop feeling so tried?
All so if I see my GP is there any such medication to boost immune system as I am picking up everything because of my immunity being so low and weak?