7 wks. Spotting normal?

Maggs • My family is my life. I have a 3 year old and another on the way.
I just went to the restroom and noticed a tinge of blood when I wiped. Is that normal at 7 wks? It's my second baby but I don't remember if this happened the first time around. I have constant cramping all day as well...just wondering if I should be worried or not...