Spotting in early pregnancy - kinda TMI

I am 4 or 5 weeks pregnant, just found out last week. I am so excited but have been having brown spotting on and off and am starting to get concerned. I tested with a digital with week predictor last week and got 1-2, this morning got 2-3 so that puts my mind at ease a little, but I can't help but be concerned about he spotting. It is only when I wipe after using the restroom, not every time just happens on and off. Any insight, similar experiences, advice, anything? Please?