Streaks of blood in vomit?

Brief history, I’m a Type 1 diabetic, I have a hiatus hernia and neuropathic pain in my lower body. I also have a condition they are looking into where periodically (1 or 2 a week) my eosophagus closes and I have to cough the food back up.

A few weeks ago, when I had to cough up some food, there was red blood strings thru it.

Went to the dr, they didn’t seem concerned so I went home and forgot about it.

the last two days have been very bad with the pain in my feet and legs.

This morning for no reason what so ever I suddenly felt intense nausea. I got to the bathroom in time to lose yellow bile with stringy blood thru it.

I’m feeling very lethargic, have a thumping headache and really don’t want to go anywhere, even to the dr’s, hence coming to an on line query site.

My blood sugars are bang on what they should be.

Any idea’s about probable causes and appropriate responses?