Fungal infection. Help me doctor. anu!

Hello doctor, In my childhood I met with a small accident and I lost my big toe nail. But I was not went to any physicians to remove my nail. I removed my nail at my home by my father. But now I have cracks in my big toe. But later it became a painful wound. And also some water bubbles formed in my toe and releasing blood and pus. So, I went to general physician to cure my problem and they gave me some medicines and put 2 injections and advised me to consult a dermatologist. After that I went to consult a dermatologist and taken medicines to cure my disease and my wound was cured but again some big water bubbles formed. So, I again went to meet the same dermatologist and she said that I was suffering from fungal infection and she prescribed  FUNGICROS ointment. Now Am using that ointment for more than 4 days but again one big water bubble is forming and also my toe is cracking and blood and pus is coming from the cracked wound. I don't know what to do. Please help me doctor.  Anu