Overly courteous people

How do you handle people being overly courteous to you due to being pregnant?

I’m 32 weeks with #2.

I really, really appreciate that people care so much but it’s like I can’t do anything at work without someone saying “don’t worry about it I can do it”, or “you should just go sit down” or “do you need me to help you with that?”

It just makes me feel like a burden. 😕 I’m more than capable of doing what I need to do. I’m pregnant, not an invalid.