Autointoxication and improving digestion
You suffer from autointoxication and there could be many reasons for it.
I recommend getting outside help to track it down, get an iridologist, try to find some that does "Active Live blood cell testing", and definitely enroll a naturopath or two. Try what they have to offer for 1-3 months and if things haven't somewhat improved, find someone else. You need to start doing some tests to track the real problem down.
DIGESTION
Your digestion alone could be the problem.
You can improve digestion through "probiotics" 30 minutes before your meal, "digestive enzymes" during your meal, "betaine HCL" 30 minutes after your meal. Some good stuff is from Premier Labs.
http://www.naturalhealthyconcepts.com/premier-research.html
Try to drink water 30 minutes before the meal, but no sooner. Water will actually hurt your overall digestion if it's too close to meal time. Dry not to drink too much of anything 30 minutes before and after a meal.
When eating, try chewing every piece of food 30 times or until it's mush. This will improve your digestion, DRASTICALLY. It will allow you to eat 25% less food for the same nutrition. This is called Fletcherism.
When eating a meal, eat vegetables first, starches next (try not to), and meats/protein last. This alone improves digestion and is part of "Natural Hygiene". Try mono meals (only 1 food type is eaten) to see if things don't improve.
The "smelling like someone else" symptom is often because of parasites, which are definitely transferred from family member to family member. Try taking Parastat to get rid of them, 1 pill per meal for the first week and then 3 pills per meal for weeks 2-4, to see if that doesn't help. Ideally, you would get tested for
parasites FIRST however!
http://www.naturalhealthyconcepts.com/parastat-p-premier-research.html
I know this sounds weird, but your skin is actually trying to detox and it's doing a really good job, that's why you're having all of these problems. It sucks, but it's a lot better than getting cancer or other problems. I know it's bad, but It could be worse.
There are a lot of suggestions now, you could try things for months now. Eventually you will find a solution.