Spotting on birth control?

ok so i've be on the ortho evra patch for 1 yr presently and my period enjoy other be pretty much like peas in a pod every month.in the order of a week ago when i wipe it be brown resembling dated blood and next i be spotting blood (only when i wiped)for just about 4 days in a minute. it have mostly stopped.im suppose to attain my spell on saturday.what could this be?should i be worried?
Answers:

Im crabby!?

It may be that your patch isn't strong ample for you, so if it happen again subsequent month, shift stern to your doctor and they will probably prescribe a stronger dose patch. It's still protecting you from pregnancy, it's of late not adequate to stop bleeding.

Tell me ur emberressing stories ?

don't be worried. its impeccably majority.