P.K.
I'm also sensitive to harsh chemicals. I use vinegar and water for most of my household cleaning...it's even less obnoxious than Windex, and most people don't find Windex too bad.
For the showers I use Green Works by Clorox. I think that's what it's called. It does have a bit of a stronger smell than I'd like, though it's not so chemically and definitely not as strong as Scrubbing Bubbles.
For the toilet I'm still using up the rest of my regular toilet bowl cleaner, but I was thinking of transitioning to baking soda or something more natural and easier on my asthma. I'm not sure how well it works, I'll have to look into it.
One tip I have is to try and do a quick "swish and swipe" of your bathrooms daily. It only takes a minute or two to quickly wipe the counters and bowl, and if the dirt doesn't have time to build up, you may not need such harsh cleansers. With the shower, I don't do that daily, but I've heard that liquid shower gels make for less soap scum, which makes for easier cleaning.
Good luck.