Hcg level low

Nicole
Immediate care just called with my hug level, first one we took. I got a positive pregnancy test last week on Wednesday, wasn't even due to start my period until Friday. Well I went and had my blood drawn Friday. I have had very minimal spotting which is mostly brown, had a little bit of red last night and this morning but it's nothing like a normal period. My hcg level was 6, which is very low. Now we are waiting to get more blood drawn to see if it goes up. I'm a nervous wreck. My hope come from the fact that we are doing all of this before I ever had a missed period. I would only be about 2 weeks pregnant. Anyone ever experienced this?