Anxiety shortness of breath

I suffer from generalized anxiety and usually have daily panic attacks-I am on 20 mg of lexapro (not working) but lately for about a week I have been feeling what I assume is shortness of breath (feeling like my air is coming from my chest and not my lungs) it’s a weird explanation…I find myself yawning to be able to “take a good breath” also I notice my heart has been having palpitations and because of that I’ve been focusing on breathing and sometimes forget to take a breath etc…it’s so exhausting I am so worried about this. Thinking of going to the emergency room but idk if that’s worthy?..