My sick little brother?

I'm 15 and my little brother is 12 and he has been sick since this morning at around 5 a.m. I found him silently crying because he has an ear ache. Well our mom slept with him last night because that's what she always does when were sick to help us calm down and relax. Well she was also drunk and it didn't help Brody any. Our dad is at work and doesnt know brody is sick and mom is still in a hangover. He isnt like dying or anything but he does feel bad. His ear hurts nose is stufffed up,sore throat and got sick this morning.has a temperature of 101. I can't take him too the doctor because I am 15 and mom can't do it obviously and dad is at work and wont be home until later.. I'm the only one available and sober enough to take care of him. I've given him liquids and stuff so he don't get deydrated and I gave him some chicken noodle soup to make him feel better. now he's sleepy but is so upset he can't sleep. It sucks because i do feel sorry for him. We share a good brotherly bond and I want to help him fall asleep and get better.He has PTSD.(post traumatic stress disorder) if that tells you anything.He keeps hugging me and crying and stuff and it makes me feel sad :(. Any ideas on what I can do to help him relax and fall asleep?