Anal fissure. 3 doctors. please help.

Hello i am a female 27 year old i have had anal fissure almost 7 month ago then i consulted the doctors they said due to hard stool there is a fissure but told me it does not need any kind of surgery as its just a minor fissure then it got healed.But after sometime again due to hard stool the problem re occured then after using ointments and stool softener everythings felt good.But now again i feel pain and burning sensation after bowel movements which continues for hours so i have been on medication by doctor for nearly 2 months still feel burning sensation i am fed of taking medicines as it heals and happens again.My doctor says there is no need of surgery as there is no bleeding and the fissure is minor .But why i am not healing fully and feel tensed as i am not able to get the normal life as before.Please share me your valuable suggestion will it need time to heal as i changed almost 3 doctors .Please help.🙏