I need help

I need to lose weight. But I have no motivation whatsoever to. But I need to BAD. I'm already an extremely picky eater, and hate healthy food. Everytime I try to eat better and start dieting, I start to feel like crap. Huge migraines for days, extremely tired all of the time, and constantly hungry. It's not even like I'm starving myself, I eat big portions of healthy food and still feel this way. It's so discouraging and I just don't know what to do anymore. Anyone have any advice? 😔 I'm 5'5 and 180lbs. Biggest I've ever been. I can't even look at myself in the mirror anymore, but I just don't know what to do. I'm tired of being sick everytime I try.