It's very common to have light bleeding in your first trimester of pergnancy for a couple of different reasons (( I had also had a little bit of spotting )) one because your body is changing and streaching to better you during your pregnancy, another becuause your body is getting rid of the extra fluids in the womb.
Bleeding is only considered bad when it soaks through a pad or a tampon in a short period of time, or when there are clumps with it, as long as sever cramping which can be a sign of misscarrage.
All bleeding should be reported to your dr but most is very common.
Hope I helped you out in any way.