Do I need a medicine change? Of drug?

I was on Dosulepin 25mg from 2015 and had to abruptly discontinue it when I had to undergo surgery and chemo in July2018. I did not resume medication for depression as I felt fine untill ~Mar 2020. I went back to my psych and he put me on Escitalopram initially 10mg and about a year or more later to 15mg which I'm continuing. I've noticed that my ability to focus and my levels of motivation have be quite low, going downward from say 2017. My psych. is convinced the medicine is the right one, that I should seek psychotherapy and workout. I managed to find a therapist qualified enough about 6 months ago but it isn't helping my motivation and focus. Since I don't have the motivation for most things, I'm unable to do the exercises my therapist asks me to. Because of my difficulty and lack of discipline with concentration, I've lost quite a few jobs and afraid i might lose the current one too. I badly need to "rescue" myself from this situation. Does this warrant a change of drug?