My chinchilla looks very weak and has a suspected lump on her chest?

My chinchilla was running around the living room all happy and jumping as usual than we haven't sEen her for a while than my girlfriend found her behind the tv and she wasn't moving unlike other times were she wouldn't even let you get within 5 ft close to her she runs away . After doing research online the symptoms she had it seemed like a heat stroke and I immediatly put 2 fans ,sprayed her with water , gave her water tru a straw I never knew they were so sensitive to heat and it was a hot day (memeorial day )yesterday. Then I moved her to our room for the ac while my gf crying and looking after her ... When golosa that's the name of the chinchilla tries to wake up she kinda trips and falls . I searched online for a vet but none expertise in chins and even if they did memorial day nobody opens .. This morning before I went to work I took a look at her and she's curled up in a ball position and I picked her up to give her some kisses and hugs just in case she don't make it till I come back from work and I felt a lump on her chest ... Than I was like wtf ,seriously wat else can go wrong . The first thing it came to mind was gas maybe but this is on her chest and she was pooping when I picked her up. I don't know wat else to say but I need some help and there r no vets for chins in my borough and although I don't have a lot of money since I got rent and otherbills I'd be glad to pay $1000 to see her feeling better again she is our baby and we take her out to run around the living room . I'm feeling desperate more than ever I feel like I would never recoverspacially my girl friend ....