Hello. I have been fighting a cold for almost a week so today I took one Mucinex DM around 2pm then I took 2 more at 11 pm. I've had to poop a lot today, I started not feeling well right after the second dose and when I checked drug interactions I found that me taking Sertraline is a major interaction. I'm having increased heart rate and a drowsy feeling including the upset stomach. Should I go to the ER?