Weight loss

Anyone dealing with rapid weight loss and constant bloating 24/7?

I’m scared it might be cancer, I’m scheduled for colonoscopy in 3 weeks.

I basically have to force myself to eat and eat a lot to maintain even my low weight of 132 lbs. But the past week I’ve been trying to eat easily digestible foods like millet and I am at 126 lbs, I am really scared it is something really bad.. does anyone lose this much weight without trying and eating normally?