Emergency Bleeding Cat

I am not sure what all is involved in a cat in heat is? My cat Max is a large black cat that has been nutered, so I am not ure if Max stands for Maxine or Max a Million. I have a problem with him bleeding from his butt. It is sometimes light, and other times more red. What can I do for my great companion? I have called local vets, and human society, animals for Rescue and nobody will see my cat unless I have money. I am on disabilty and Max is my theroputic cat. Can you help me so that I can help my Max. Please!!!

WARNING: I won't be able to post again until Monday, after his post. So I'm stuffing as much information into this answer as I can.
   
Spayed cats don't go into heat, so it's not that. (A cat that big is probably a male.)
   
How often does the bleeding happen? Is this new? How long does it last, if it happened before?
   
Does Max seem to be in pain, or does he appear to ignore it? At these times, does he use the litter box reluctantly, or as normal? Is he hiding? = If he's acting mostly normal, then he may be alright, & just have a minor problem that will clear up on its own.
   
If he doesn't appear to be avoiding the litter box, or appear to be in pain, & is acting mostly normal, it could be a temporary situation that isn't life-threatening.
   
Since the blood is red, not black, & there's not a lot of it - then there's less cause for concern. Red blood at the rectum (without any other symptoms) is usually an indication of an irritation of the rectum, or just inside it, or a small cut or scratch. This passes as the cat heals, usually a few days. Check his anus - see if it's irritated & red, or if there's a scratch you can see. If it doesn't start clearing up in a couple of days, then he should see the vet about it.
   
Black blood is cause for panicking.
   
You called Max your therapeutic cat, so someone must have prescribed a cat for you. If there's an organization involved, call them up & ask for help.
   
Call your doctor, ask for his help, too. He must know about Max.
   
The woman who trained Max - Telephone her immediately, ask for her advice & help.
   
Can you afford to pay a little each month, over time? Perhaps you could make a deal with her to have her arrange for a vet see the cat, & you can reimburse her over time.
   
Call every single vet in your area. Tell them that your therapeutic cat needs care; that he keeps you breathing; tell them that you would like to arrange for regular time payments over a period of months for his vet care; it's just that you don't have the whole amount right now. Be persistent.
   
Go to http://www.Petfinder.com, & search your zip code for all local private adoption groups. Call every one of them, ask if they can arrange for a vet to see the cat, & have you pay them back for the cost of care. Explain your situation & how Max keeps you from dying in your sleep. Call every single group.
   
Do you have any relatives? Can they help?
   
Are you a veteran? If so, try asking a veterans' assistance group for help - even the local VFW or the American Legion.
   
Do you go to church? Ask your pastor for help.
   
Are you a senior citizen? Go to the nearest senior citizen group, ask them.
   
Read the contents of this Human Society of the U.S. web page for ideas on what to do:
   
http://www.hsus.org/pets/pet_care/what_you_can_do_if_you_are_
   
having_trouble_affording_veterinary_care.html
   
This page specifically states that the Humane Society of the United States has a list of organizations that provide assistance to senior, disabled or ill pet owners. Look at this link.
   
The local animal shelter should at least be able to give you the names of vets that work for less.
   
You MUST get a regular vet for Max, regardless of the outcome of this problem. Animals need regular care, including shots, checkups, everything. When you find a vet that will take time payments (many do now), take Max in regularly for his checkups. YOUR LIFE DEPENDS ON IT - & so does his.