Trigger warning,

I had a miscarriage 4 weeks ago almost 5. I went to the doctor today because I thought I had a uti. They wanted to do a pregnancy test as well, came back very positive. Called my ob. She said it’s very possible I got pregnant immediately after my miscarriage, but I’m not sure what to think at the point, my blood work will be back Monday. Has anyone had this happen to them before?