So I was already late like 9 days, and I had sex and he came inside. But now I'm bleeding like if I was on my period but usually when I'm about to get my period I get cramps and start breaking out and this time it wasn't like that. I have been having symptoms of pregnancy but I don't know if its all in my head. I'm wondering why am I bleeding when I was already 10 days late and I usually get my periods on time. Should I wait or take a blood test? Because I did a urine test and negative results came in. Need some help please, new to all this

Periods vary and at 9 days late you really would not be having too many other "signs" yet.
You can wait about one more week and do a urine test. Use the first urine of the morning.
But periods are often late, some women miss one every now and then.

Also I will have to assume you had sex last month before your period was late, not just the one time after.