I don’t know what’s going on

So I have been bleeding for three days and my period was suppose to happen on the 21st. I went to the closest er because none of the doctors offices were open plus didn’t have money for office visits. I tell the receptionist I’m there to see if I have a kidney infection. I fill out paperwork and get called to the back. The doctor comes in and I tell him that I’m having pain on my sides and lower back. I’m not having pain peeing, didn’t have any blood in my pee. I don’t know why they kept saying kidney stones when I wanted to know if I had a kidney infection. I kept asking if I had a kidney infection they kept saying kidney stones like I don’t have any stones. The result come back and he says there not really an indication of anything but there was a small amount of blood. What the hell does that even mean? I’m having to find a different doctor who hopefully can find out if I have a kidney infection or some type of infection in my body.