Adjusting to New Medication: Will the Side Effects Go Away?

I began taking 10mg of Lexapro on 4-16-22 after having been off of Paxil for almost 2 years. These last 3 weeks have been miserable and I'm wondering if all the physical and mental side effects will go away once I up the dose to 20mg as my doctor suggested. I take it at night before bed. I have experienced sweats, chills, shakes, internal tremmors, racing jumbled thoughts, paranoia, and intense stress upon waking every morning. My stomach is always upset and I also have a heaviness in my chest and upper back that makes it feel like it's hard to breathe. I am terrified that upping the dose will make all of these symptoms worse and I'll panic and run to the ER. Does anyone here have similar experience in adjusting to new medication?