Constantly eating!

Hello! I'm pregnant for the first time and right at 6 weeks I started feeling awful. I'm 11 weeks now! I feel hungry all day long - the same feeling I would get pre-pregnancy when I'd be really hungry, but eating would always help. Now, it only helps slightly. Does that make sense? I am constantly eating small snacks to fight it off otherwise I will throw up. After dinner, which is usually a small meal, I have a lump in my throat the rest of the night like I might throw up, and often do. Is anyone else experiencing this? I am trying to figure out if this is "morning sickness" or if there's some other metabolism/blood sugar thing going on. Although, I think the doctor would have seen that in my blood tests. 
Here's to hoping it subsides soon!!