What you eat/drink

So does anyone else have people telling them what they can/can’t eat or drink. I have a coworker who keeps telling me that I’m not allowed to eat or drink certain things. Like today she told me I’m only allowed to drink water and eat nothing but completely healthy food (I’m not going to completely change my diet because I’m pregnant). She also told me I’m not allowed to eat crackers. She doesn’t have any type of medical background or have any children.