Birth control shot and periods to stop

Been on it for 4 years, I’ve gained 50lbs from it, went up 4 cup sizes, I throw up so much I have to take meds to keep it down, my hair is ALWAYS falling out, my body is always aching and I haven’t had a single period since I started it. Not to mention I get dizzy, sweat non stop, and have trouble falling asleep and staying asleep now.

Getting off birth control and having cramps idk why I only been off for like a month or so

I have been on this form of birth control for 3 months now. I got my first dose on the last day of my cycle. This is my first time ever on birth control. After the first dose my cycle went away. I got my second dose 2 weeks later than what I was supposed to, because my gynecologist rescheduled my appointment (because they’d be closed that day). I started bleeding a medium-light flow 7 days after i was Supposed to get my second dose. I have been bleeding for 28 days straight now. The flow is the lightest it has been so far today, but it’s annoying to deal with. I get my third dose of depo in 2 months, and I’m honestly thinking of quitting it.