In our home, we use a lot of chillies, and my MIL always told me to reduce it to avoid body heat and stomach upset. Spicy food doesn't hurt the baby, but it can cause severe heartburn. My doctor said mild spice is totally fine, just don't overdo it.
I don't think chillies are harmful to the baby, but they can make you very uncomfortable if you get acidity. It is probably best to eat mild food to keep your stomach happy. I am trying to eat less spicy these days just in case.
Omg, I am in my second trimester and I want spicy street food all the time! Chillies are not bad for the baby, but they give me horrible acidity later. Are you also dealing with crazy heartburn after eating spicy stuff?
According to my pregnancy tracker apps, spicy food is completely safe and won't harm the baby. The only issue is that pregnancy slows down digestion, so chillies can trigger bad reflux. Keep some cold milk or curd handy if you eat spicy!
Personally, I ate a lot of spicy green chillies during my pregnancy because I had a massive craving for it. It didn't cause any issues for my baby, though I did have to deal with some mild indigestion. Everyone's body reacts differently, so see what suits you.