Constant Palpitations

I’ve been having palpitations for a few days now, they keep me up at night. I also feel weak when I’m up walking around or doing activities. I got an ekg done and it was normal and I got my troponin levels checked that was normal too . I have a stress test scheduled soon and an echo test . I have bad anxiety as well and never experienced this . I’m so nervous . I’m not pregnant. They did say my potassium was low and I’ve been taking meds but my heart isn’t back normal