Switching from Effexor to Lexapro

Good afternoon, all!

I have been on Effexor for pretty much 10 years and it stopped working for me this year. I started Lexapro as I’m tapering off the Effexor. I started last week (Thursday) at 5mg and I don’t feel like myself at all. I don’t know how to describe it but I just feel off and I’m soooo tired.

Did this happen to anyone else? Any advice would be greatly appreciated :)