Medication changes & late period

I usually take the antidepressant Lexapro. About two months ago I lowered my dose and now my period is late. My cycles can sometimes be long or irregular-- I had the same concerns last month until my period came on day 35. I'm on day 35 now and still haven't started.

Anyone else experience late periods after medication changes? I'm taking a pregnancy test in the morning if I still don't start 😧