If eating spicy food does not seem to upset your tummy and cause a great deal of gastric discomfort, I say eat it! Capsicum is one of the healthiest things you can eat! I am sure baby will thank you. If spicy food has always been a part of your diet I see no need to change it unless otherwise told to by your OBGYN.
With my first child I ate spicy food all of the time. I had heartburn frequently but I could honestly say it was not directly related to the spice. He was just causing me grief!