Faint line

So I went to the dr today because I'm I'm on clomid & had lite pink bleeding yesterday. However when I went to the dr and had a sono the dr said he saw something "thick&juicy" whatever that means. I took a test it was negative in the office. 15 mins after I left the dr calls me back and says a faint second line came up & to get a blood test. I would be about 3 weeks today. Can this mean I'm pregnant or can it be a chemical pregnancy? And can you see anything in a sono this early? & WTH is "thick&juicy?!" I'm going crazy