Uy mama, kahit common yan sa pregnancy, ang chest tightness with difficulty breathing ay kailangan i-check ng doctor agad, lalo na kung masakit at nakakaworry ka. Please don't wait, okay? Go to your OB or emergency room para ma-rule out kung may iba pang nangyayari, especially since may vomiting ka rin. Better safe than sorry, lalo na ngayon na may baby ka na!