Luna the husky needs your help

Hello I've never used this before but sadly the way things are for everyone I find myself coming here , Luna is my 10 yr old husky she is my world and about 2 weeks ago she was rushed to the emergency vet for treatment, she was given 2 lots of needles penicillin and a pain killer,thankfully it helped lower her fever and she was able to come home she had an infection in her stomach. I have pet insurance have to pay the first £150 yourself and hopefully the insurance will cover the rest .The reason why I'm here is that she needs to have bloodtests done because she's drinking so much water more than usual so they are doing a wellness check that consists of bloodtests and urine tests the cost is £100 plus ,I'm currently on sick from work so I'm only getting half my regular pay and after the bills are paid there's little left. I want luna to have these tests done because I'm afraid that she's not well inside and to be honest I don't want to lose her so if she has the tests done they can find if anything is going on that shouldn't,so then can start the necessary treatment if needed. Thanks for reading this,if you choose to help luna that would be wonderful I would be in your debt forever but if you choose not to I understand ,life is a mess at the moment for us all .Thanks again Patsy and Luna.