Ultrasound question

Priscilla

I’m 8 weeks and 3 days today. Before I found out I was pregnant I spotted light brown. It wasn’t a lot, but it happened for two days, but not consequently so I knew it wasn’t my period. It was barely anything. No spotting ever since. This led me to take a pregnancy test because I was already about 10 days late with my period. I took two tests which came up positive immediately. I was and am so excited!!!! Anyways, I went to a clinic and took a urine test and got a positive, but they told me I couldn’t get an ultrasound for a while because I did spot. I was also told that I needed to get a full diagnostic ultrasound. I thought some spotting wasn’t a bad thing??? I’m confused. This is the first time I’ve been pregnant, so I honestly don’t know much. Can anyone give me some insight?