Re: lifting, your body is pumping itself with hormones which relax muscles at the moment. That's why you're more prone to a muscle strain of you overdo it. I'm the worst with shopping (ie trying to bring 20 bags in from the car in one go rather than do several trips!). I know it's too much as I get a slight pulling sensation - I ease off, be sensible and it's fine. If in doubt, ask someone else to carry boxes - they won't mind! Of course those pg with a toddler will be lifting all the time.
As for cleaning products, I wear rubber gloves (don't bother normally). I avoid things like cleaning the oven - who am I kidding? That's something I avoid pg or not 😀