Any advice please?

I could use some opinions on what may be going on. For the past couple months IV barely felt thirty, like I literally have to force myself to drink and usually I love to drink water but no I can barely drink it. I feel like I'm gaining weight all I want is junk food. I used to be able to eat healthy and control my eating now I feel like it's out of control. The past 2 days IV been spotting blood and my period is like a week and a half away.I had my son 6 months ago. Got on pull birth control 6 weeks after I had him... Any advice would be great! Thank you In advance!any advice