Job related question while pregnant

Brittany
I didn't work with my first child until she turned 4. I was so protective on who watches her. She didn't even go to daycare I was so scared. But anyways I'm currently pregnant with my second baby and I'm working while pregnant. I had an issue last night at work. I basically trained myself because everyone else just ran around with there head cut off. So I decided to take notes on the important things I needed to know for my job. Anyways I nicely asked the lead cashier to help me lift a ceiling fan to deactivate it. She made it seem like I just screwed up her whole life. She was so rude in front of customers. Saying "We gone have to talk." In a very rude matter. I simply asked to talk about what? I asked her a simple question saying, "that's heavy and I'm pregnant." After the customers left I asked her what did she have to tell me. She said, "I had 3 kids and huge and I could pick up heavy stuff." She also said, "that box was not heavy at all." I said, "yes it was that's why I simply asked you could you lift it and deactivate it for me." She went on and on about that. I just left it alone because now I'm super pissed off. I have NEVER did anything in my life to jeopardize my job. I have a child and a baby on the way to care for. I know I have responsibilities I have to attend to at work. But one simple question lead to her being rude and not acting professional. WHAT SHOULD I DO?