Brown discharge 7 weeks

Hey everyone!

Today I am 7 weeks pregnant and excited with this first pregnancy. On and off I have symptoms like fatigue and painful breasts but not every day.

Last week at 6w2d I had some pink spotting in my mucus when I whiped myself (sorry for TMI). It was a one time thing.

Yet this morning I got up very early to urinate and I had some very light brown spotting/mucus. It was also when I whiped myself and It didn't happen again today. I don't have any cramps. I only slept a lot today

Is this a common symptom?

I have my first us scheduled when I'm 9w.

Thanks for the responses