Brown spotting!

Casmine • I'm a mommy to two wonderful children. Aubree (born 9/3/11) and Brooks (born 4/14/15). I'm very blessed! =)
I woke up this morning and went to the bathroom. When I wiped there was brown blood on the tissue. Is this something I need to be worried about? It wasn't a whole lot but enough to scare me. I had a miscarriage last year (6w6d) but had red blood then...just wondering if brown blood is common. I'm 8 weeks 4 days today...thanks!