Chest pain

I'm 28 years old and am 8 weeks pregnant. I also have tachycardia. My resting rate is around 110 beats per minute. I had intercorse with my hubby tonight and right after had a hard time breathing and pain over my heart on the left side of my chest. It felt like I was hyperventilating. After about 5 minutes it passed but I still have a tightness in my chest 45 minutes later. Inhave a call in to my doctors, just curious if any of you could add any insight?