Bleeding after anal sex. How long?

May be too much tmi, I'm not sure. Me and my s/o tried anal for the first time last night and it hurt at first but I was fairly comfortable through it as it went on.

But as I went to use the bathroom last night, there was blood as I was expecting bc we didn't have lube on hand and didn't work our way up (spur of the moment).

How long will bleeding last?