I (22m) have chronic constipation due to what doctor thinks is ibs. I get constipated for a while, especially when I'm stressed. I have periods of normal bowel movements.

Currently I'm going through a bout of constipation. I haven't had a complete bowel movement in a couple weeks. I go everyday but it seems that I'm not relieving myself entirely. 

My dad told me that as long as I'm going a little bit that I shouldn't worry. But I'm scared my bowels are going to explode and kill me. Is this an irrational fear? I'm so scared of this happening. I am a health anxiety sufferer.