Severe anxiety,

I am in a CONSTANT state of worry and I’ve noticed that my breathing always seems altered…almost like a “full” feeling in my stomach causing me to not take deep breathes or something along that line…not sure how to explain it. Once I sit and focus on my breathing by taking small normal breaths seems to make me feel normal again but it’s basically constant. My anxiety has also caused me acid reflux & ibs symptoms…I’m so tired of this cycle. I am on 20mg of lexapro but no help.