Anal fissures. And again is it serious?

I am suffering from anal fissures since 2 yrs. I have already consulted 2 doctor's the medication gives me a temporary relief.. After stopping the medications the problem raises again.. Since last 5 days the skin tag is killing me .. Like the pain and burning sensation lasts till evening after passing stools in the morning .. I don't know what to do .. In this worst pandemic condition I don't even have a chance to consult a doctor.. I read in the internet that a fissure usually lasts for some days and heals on it own... But it my case since 2 years the fissures appears atleast for 2 days in a weak... What should I do??? I am a student I do travel by bus to college.. Now I can't even sit and walk properly because of this pain.. The pain is unbearable now... Plz Consider my problem and I hope someone gives me a solution for a permanent relief.. Or a proper reason like why the fissure comes again and again is it serious?