light pink spotting anyone?

Hey gals. I am 5 weeks along. Had the slightest bit of light pink blood when I wiped today after peeing. Called the Dr. and she said that is quite common. Had me come in to do some bloodwork. I should hear from her by the end of the week. Just made me nervous. Anyone else have this happen and then all was OK? Be gentle please I am feeling emotional lol. Thanks!