I just want to asked what is the best doctor to...

What might be the cause of your symptoms ?
As you have mentioned that you had painless bleeding from the anus, the commonest cause is hemorrhoids. And it is treated by antibiotic to heal the infection and cream to decrase the swelling and the pain. However, you might have another problems such as perianal abcess or even a tumor
What are the needed tests?
You should undergo a physical examination by general surgeon to know your medical historty and assess your conditon. Complete blood count should be done to rule out infection and anemia. Per rectal examination to assess the problem that you are suffering from. Colonoscopy might also be needed
What is the treatment ?
First of all, we need to reach to the diagnosis and the treatment will be accordingly. In case you are suffering from hemorrhoids, it is treated by lactulose gel to improve the bowel movement and stool loosining. Lidocaine cream and anusol cream could be used also to decrease the pain and the swelling. If there is an infection, antibiotic should be given according to the type of infection. Furthermore, you should avoid constipation by drinking plenty of water in an average of 3 liter per day, increase fiber intake in your meals as well as having some exercises 
What is the outlook ?
It's advised to see a general surgeon for further assessment and treatment