Question regarding Depression and Medications?

I just started taking Lexapro recently, and have had my first session with a counselor , I’m just curious how long before people felt an improvement or should I ask my doctor / counselor about trying different brands.
I’m onto my 6th week now, and I still have that never ending feeling of being worthless and aimless.
Some days are better than others, but most of the time I’m just faking it, It’s something I’ve become used to doing.
I have depression and have had it since a young age but up until recently I didn’t want to acknowledge it or take medication , or talk to anyone, up until recently when things got pretty dark and I began to scare myself. I still do at times, but I don’t think I would ever act on it.
Sorry don’t mean to ramble on just started.
But back to my original question should I consider talking to my doctor / counselor about trying another brand?
anyone else with these kind of experiences have some advice.
Thanks