I felt similar to the way that you do for almost 8 months! That's how long it took my me to get a good grip on my IBS.
I am still struggling with my insomnia which is a pretty serious thing in that I always wake up like a zombie and often have low energy. It's no fun.
It sounds like you have anxiety and even a panic attacks? I used to get that throat closing thing ALL the time! I even made my BF take me to the hospital a couple of times thinking I was having a severe allergic reaction. I never was but they gave me some Benadryl to be safe. I'm sure they knew it was anxiety or stress.
You have been through A LOT lately. I have been following many of your posts for the last few months and you have had a very tough time. Anyone would be down in the dumps and discouraged.
OK! You are moving back to Canada soon. That is something to look forward to. I know you won't kill yourself but don't even go there, missy! You are WAY too special to dissapear like your life is not significant. IT IS!
You WILL get better. I don't know when or what will help but things can only improve. You need to do some serious checking into your diet to see if you're eating bad IBS stuff. I kinda think the stress is making your tummy so crazy and mad at you.
I would try a new AD, for sure. I have had amazing results with mine. It is called Celexa and you can get it when you come to Canada. I don't know if it would help with your IBS but it has helped mine tremendously!!!
Never give up hope, my friend. EVER. Even when you've had 1 month straight of pure hell. There's always at light at the end of the tunnel. A saying that I **LOVE** from my Buddhist meditation class is "you need to hear the silence behind the noise". You need to. There will be good old fun times to come sweetie.