Spotting and pregnant

Hi all!

My doctor doesn’t seem too concern. I never had this happened with my first pregnancy. Im currently 5/6 weeks pregnant with my second child and I have been spotting brownish for the past 2 days with very very light cramps. Today when I peed in the morning, I saw about 3 brown small looking strings in my pee. I went to pee again a few minutes ago and now I saw a few brown tiny powder specs floating in my pee (looked like powder coffee kind of) .. has this happened to anyone early in pregnancy?? Can it just be old blood maybe?