So scared

Kasondra • baby girl was born 11/21/16 💜 ttc for baby #2!
Got my first positive this morning well (4) of them actually faint lines so I got a blood test also today and I'm scared my hcg level is 16 and I would be considered 4 weeks and 4 days pregnant going by my last period and she didn't say it was bad or good she just said im very early and asked had I even missed my period yet and I have by a day or two and I have to retest Friday as long as I don't start bleeding ... But can't help myself but be so scared and shaking I can't wait till Friday :(