so for the last three hours I have been spotting. it first started out brown and now its light pink.…

so for the last three hours I have been spotting. it first started out brown and now its light pink. I have wore a pad the hole time and there is no spots on it. but there is definitely some when I wipe should I be worried I'm not hurting at all but I'm also a little over four weeks pregnant. I'm gonna make an appointment Monday but can anyone relate to this?!? I'm worried.