Big bump at 12 weeks???

I am almost 12 weeks in a couple days. My first pregnancy. People have made many comments about how large I look already and ask me if I'm having twins. I find it very hurtful and insensitive. I am 5'2 and an average build. I've been an athlete my whole life. I'm having a hard time with the comments made to me about how I look. The shock on people's faces when I say I am due early April and not February. Has this happened to anyone else? How do you respond to this comments? I know I'm supposed to embrace this time and I want to be able to not feel so hurt when people make comments everyday. It's not like I can control how my body reacts to pregnancy.