Need to advice..

Laura • Hi. Me and my fiance are trying for our #1st. Both in our early come mid 20`s. Im a professional Dog groomer/Business owner.
Im 4-5 week pregnant, me and my partner had sex for the first time in 4 weeks (due to me stressing about possibly having a mc) and when i went to wipe there was very light pink on the toilet paper, what does this mean? Im getting nervous about it all. Is this normal?