Anxiety and panic attacks. Of 24 years.

Good afternoon, I've been experiencing intense anxiety & panic attacks since the past 10 months(October 2018) onwards due to which daily functioning has been adversely affected. The major symptoms are constant heart palpitation and pain, nausea, trembling hands and extreme difficulty to function. This can be part of the panic attack which is not associated with any stressful events or thoughts but rather quite spontaneous and all of a sudden unexpected panic attack which causes severe heart palpitations, and pain, nausea, trembling hands and adversely affecting the daily functioning. I've been through severe anxiety and panic attacks many times in my life since 2008. The doctor had prescribed escitalopram & had taken it since 2017 but it's not effective now as I've been undergoing severe anxiety and panic attacks since the past 10 months and while I'm going through anxiety and panic attacks, escitalopram prescribed by the doctor is not effective. I am a Lady of 24 years. Thank you