Blood from nowhere?

Alexis

When my lo woke up to eat this morning I noticed a few blood drops on her nightgown. They werent all on the same spot some were up by the sleeve and one down lower than her belly button (4 drops in total), but i noticed some blood rubbed on the collar too. Theyre very small but its still scaring the shit out of me and i dont know of i should call her pediatrician or not. She doesnt seem in pain. Her belly buttons already healed, shes 1 Month so its not that. She was up fussing last night for 2 hrs so idk if maybe something was bothering her then cause i just couldnt for the life of me get her back to sleep. Only other thing i can think of is i heard her sneeze last night so maybe its from her nose? Any ideas? Should i call?