Coming down with a head cold right before my birthday😭

I woke up this morning with a minor sore throat and just have that feeling you get when your just starting to get a cold. My birthday is on Sunday but I was suppose to attend a concert with my cousin on Friday and she already bought me a ticket/: I know she would be mad if I had to cancel. Then Saturday my friends were going to throw me a birthday party and I would HATE to cancel because I'm sick/: I know sleep and water will help but I am going to school and finals are around the corner so I can't sleep as much as I'd like. What are some things that really helped you while you were sick? Thanks in advance!