Stressed.

Hi beautiful ladies. So here is the thing. I had 2 miscarriages so this is my third pregnancy and I have made it to almost 16weeks. I am so blessed and my God is so good and yet I'm nervous and stressed over everything. Like I said I'm almost 16 weeks and I have no pregnancy symptoms anymore. Is this normal not to be constipated at this stage or not getting headaches or get heartburn? I'm so scared something might go wrong.