Zeke get the cancer testing he needs

Hey guys my name is Jacob and I need some help. My dog Zeke is everything I have and love in this world. He started coughing up blood a few weeks ago. We took him to the vet, tests were done, came back negative for cancer. We went home with antibiotics that night. 2 weeks later it’s still happening. We bring him back to the vet and we’re given stronger antibiotics and some anti-inflammatory meds. However, his condition hasn’t gotten much better. He’s still coughing and still bringing up blood tinged mucus. Gross I know. I just want to get him the proper tests he needs to be 100% certain it’s not cancer. I have some money of my own that will go to the tests but I can’t do it all on my own. I’m not asking for much. I’m just asking for a little bit of help. Honestly whether it’s $5 or $50 it’s money going towards his tests that he so desperately needs. Any funds left over will be going straight to a nearby animal shelter or multiple shelters around the area. He’s all I got. He’s saved my life more times than I can count, I just want to make sure I can do the same for him. Thank you