sex on last day of period

have y’all ever had sex on your last day of your period ?

My period usually last 4 days , 5 days max . On my 4th day I’m not bleeding anymore just spotting a little and when I wipe it’s old blood . And on the 5th day is just a little old blood when I wipe .

Tomorrow is the 5th day usually what I count as my “ last day”

Is it fine if I had sex ? Should I be worried if I bleed since I’m still spotting ?

I’m supposed to meet up with a guy.