Heroin withdrawls symptoms and conditions

Finally people are telling the truth about this drug.
I am 17 and have had trouble falling asleep since I was two years old. After a few not noticeable prescriptions was prescribed 15mg of Remeron. I have eaten healthy my whole life and never really cared for sweets before this drug. I literally was eating an entire pie every night. I couldn't even think about anything except for how hungry I was. Running out of sweets was honestly what I imagine heroin withdrawals are like. This went on for a few months and I gained about ten pounds. I recently I ruptured my spleen about a two months ago and have been in constant pain since then. Because of the pain I barely sleep at all. 2-3 hours of solid sleep max, so I was prescribed klonopin and went cold turkey on the remeron. I am now pretty much pain free and more social. Is it possible the remeron increased the pain?