Pregnancy scare

I had unprotected sex on September 17 (the last day of my period and the 4th day of my cycle). I am certain I won't get pregnant since my cycle length is always 30 to 35 days. However, I am now on my 36th day and still have no symptoms of getting my period. Although we engaged in intimate activity on October 4 with no penetration, I'm worried that some semen might have come into contact with my hand, which I then used to wash my genital area.

Throughout this whole month, l've been sleeping late and stressed from work and business, so I'm hoping that my period is just delayed. This year, my longest cycle has been only 35 days, but back in 2019, I already experienced cycles of 36, 37, and 40 days.