For strep throat there's not much treatment that can be done except a doctor can prescribe you antibiotics which should help treat the strep throat and make it so it's not contagious to anyone.
Best thing you can do for strep throat is just give it time and within 1 week or 2 weeks the strep throat should be gone.
Try using a vaporizer to add moisture to the air and eating ice cream which is a good food to help sooth the strep throat.