getting worried 😰

Hi im just wondering if anyone has had the same problem as me? On friday i went to eat with mu sister, we ate tacos and everytime i go there ive noticed my stomach hurts, like the type of pain when you really have to go (yes tmi sorry) i thought it would be that, till today ive been having the same pain even if i just drink water idk whats going on, im 26 weeks along and i also noticed that i get pressure in my lower back and upper stomach and i felt i was running out of breath, should I be worried? I never experienced this in my first pregnancy