I feel the same way. I was over my MIL's the other day and we were in her car; she went extra slow to the grocery store because we're carrying "precious cargo". I still clean, and i actually used drain cleaner the other day, you pour it really quick, turn the fan on and walk away for 15 mins, then put the hot water on. no biggie.
I just recently lost my job; I was a scientists assistant handling chemicals, ect. And I just had an interview; and they knew from the get-go that I was pregnant; so they were pointing out all the chemicals are in hoods, and you'll get short breaks, ect. It's nice that they pointed it out; but if I ever had an issue with stuff like that, i'd let someone know. I felt like I was being treated differently.