Soft poop constipation?

Hello

Since now 4 years I encounter some bowel issues and one of them is this :

I cant poop during 3 days and then I have a bowel crisis with huge pain which leads to going to toilets pushing a lot of mushy/sticky poop in 5-8 times. It is like I had a cork of stools. The stools are never hard. Psyllium sometime helped and sometime made it worse.

Thank you for your help.