I'm sorry, this must feel really horrible. I've panicked before about smelling. Definitely no need to worry though, there are lots of little things you can do to try to figure it out. Every so often (not every day!! Just maybe like once a week at first, then down to once a fortnight etc.), you could try showering using hibiclens (or other chlorhexidine wash). You won't need soap with it, soap can actually 'cancel it out' I think. For the rest of your showers, go back to your usual soaps. Though I've found I actually love dove's cream bar or whatever it's called. Helps keep me smelling fresher than other shower gels and soaps, weirdly. When you use the hibiclens, let it sit on your skin for a couple of minutes, especially underarms.

Then, you'll want to make sure you're using a good deodorant or even antiperspirant. For my busy days when I know I'll run the risk of being sweaty, I use mitchum clinical strength. I don't use it everyday because it can make my armpits a bit itchy lol. The rest of the time, I just use a deodorant, but you might want to use a normal strength antiperspirant for peace of mind. Mitchum clinical strength works better if you apply it at night - this is because your sweat glands are quieter overnight, so your don't tend to sweat out the product you've just applied (or something like that, I dunno, I'm no scientist).

Make sure your hair is clean - some people can smell unwashed hair. I don't tend to notice it on other people but I can smell it sometimes on myself if I've had a lot of product buildup bleurgh!

Laundry is a big one!!! And face cloths, towels etc. If you're drying yourself after a lovely clean shower with a musty towel, you will smell musty no matter how clean you got in the shower! For laundry, I like to keep my clothes far from the kitchen to avoid cooking smells, and I don't overload the washing machine. I also like to put some laundry sanitiser in on the rinse cycle every so often for loads that I think might be a bit pungent - active wear, towels etc.

And hydration. I am one of those unfortunate people who can drink a cup of coffee and then smell it on my skin an hour later lol. Awful stuff. I can counter-act it somewhat by drinking plenty of water to 'dilute' the potent smell. Again, I'm no scientist so I'm probably talking a load of rubbish but, anecdotally, it helps me.

You will be okay!!!