Depends on how many weeks you are. If you are still in the first trimester it may just be something called implantation bleeding. Which is perfectly normal. Pink spotting usually isn't anything to worry about as long as its not excessive.
Dont go to the dr. Its normal to spot. Unless it becomes alot or you have pain i wouldnt worry. Ive been spotting off and on too.
Go to the doctor .. i remember that happened to me and found out i had an hemorrhage