Hi, sorry to hear you haven't been well. Unfortunately, while it's going to be a little bit of hassle now, preparation is your only fellah, to save on what could be major hassle later on that could ruin your holiday.
The first thing will be to go to your doctor and get a letter stating what you need to travel with on your person. I had to do this myself last year. Whilst you do see people with their clear bags ready, I had too much stuff and the lady on the Aer Lingus check in desk told me I was ok leaving it in my shoulder bag. It's not like it's not going to get scanned cos they are taking no chances. I think the idea of the clear plastic bags is to speed things along and make people more conscious of what they are carrying on their person that might be banned, but in reality it doesn't cos EVERYTHING is checked.
The next thing is more hassle, I know, but when you have booked your trip, write/e-mail the company you are flying with and tell them your predicament. I'm sure they will be more than obliging to help you in any way they can and make sure that you are well looked after on board. I have a cousin that has to travel with medical paraphernalia 24/7 & he heads off twice a year & gets treated like a VIP.
I know you are concerned about the country you are travelling to, so it might be worth your while getting your doctors letter translated into the language of the country you are travelling to just to make things easier. For instance, if you travel to UAE with any painkillers that contain codeine, you will be arrested for importing an illegal drug. Therefore, while this is the extreme, last year I had to have my doctors letter translated into Arabic and get both the English version & Arabic version stamped by the UAE Embassy before I could travel.
So just do a little bit of planning now and you will be able to relax come the time.