Feeling embarrassed

I know that some women have a hard time getting pregnant and I feel sad along with a feeling of guilt because they want a child and it takes long time for them. I recently found out that I'm pregnant and I'm embarrassed by it, I can't even utter the words to anyone "I'm pregnant". My bf is super excited about my pregnancy and he tells me that it's disheartening that it doesn't look like that I am. I work as a nurses aide and I do a lot of lifting especially with residents on the heavier side, some residents are combative and I'm too embarrassed to tell them at work that I'm pregnant and I'll need help. I feel bad for the way I'm feeling but it's the way I grew up, in my culture being pregnant young is like a disease and you're shamed for it. My mom told me that if I ever get pregnant she'd be ashamed of me and she wouldn't be able to look at me the same. I am going to keep my baby, I am 19 years old and I can't deal with judgmental people at all.