Misscarrige or not?

So my period is always on time an I had unprotected sex 7 days before my period was due. I ended being 3 weeks and 3 days late and I had the worst pain if ever felt in my life then I started bleeding which just turned into a period. 
*i did not take a test because my doctor told me to wait 3 weeks after a missed period* 
I'm not even sure if I was pregnant, but I feel as if I was with all the symptoms I had. Please help??