Does this sound like IBS-C?

The last two months i have been having issues going to the bathroom. Really, the last year, but the last 2 months has been a bother.

When i was gaining weight, i had no stomach problems, but now that i was trying to lose weight, its become an issues.

No bowel movement for 3-4 days
Bloating, fullness, eventual nausea that lasts for hours and dry heaving.
Symptoms relieved by taking a trip to the bathroom or taking lactulose and passing lots of gas.

2 er visits show clear blood work and 2 xrays during symptoms show me being fully constipated, no free air. I am losing weight. Not crazy, but i have lost 24 pounds since the first week of jan. I did start a diet and now find it hard to eat so i dont get full and bring on more symptoms.

I have had this before. Twice i had bouts of this. But this is the longest its lasted and it prompted me to see a GI. To which i have a Endoscope and colonoscopy in 11 days.

For a while there i was terrified that i could possibly have something like stomach cancer. But i have since calmed down after revisiting my symptoms and dr visits.

Does this sound like a standard case of IBS-C? Are there any treatments for IBS-c that are safe?

Do they completely knock you out during the dual procedure?

32 y.o male btw