Hard to Breathe

I’m having a hard time breathing. Everything I do today seems to make me lose my breath. I noticed it a few days ago but it’s worse today. I went up the steps and had to hold on to something till I caught my breath. I picked up a basket of laundry and sat it on the table which was just 2 inches away and had to hold on to the table till I caught my breath. Walked to the pantry and grabbed poptarts for the little one I babysit and had to grab onto the doorway. Hes 3 but was like “what’s wrong Stacy? U don’t feel good?” I’ve sent a message to my dr at Duke but he hasn’t responded yet. Should I go to the er and if so what can they do?