Late Period-HCG Levels at 3 yesterday-got this today.

I’m so confused. I am around 13 days late for my period and I have been getting what I believe to be faint positives on tests. Got my hcg levels drawn yesterday and they were at a 3 yesterday afternoon. I chalked it up to being a late period. Then, out of curiosity I took a test today and got this. It’s not an evap, taken in time frame and has color. Any insight? Am I miscarrying or was I never pregnant to begin with? Are levels supposed to be 0? Why would the line get darker today? Any insight is appreciated! I have a message in for my doctor but I’m so confused.