Chest pains.

Just wondering if anyone else gets shortness of breath and chest pains. At first it started when I got Braxton Hicks but lately it’s just by itself. I told my doctor at my last apt and he thought I could have a blood clot so he told me to go to the er right away. They checked my heart and everything and said I was fine they don’t know why it’s happening and said it could just be a pregnancy symptom. I’m just wondering if anyone else has or is going through this and if their doctor said anything different. I know it’s not life threatening, just uncomfortable but it’s still weird and if someone else got a better explanation I’m all for knowing the cause.