Positive hpt but negative blood???

Jei

Hello, so I just have a feeling I’m pregnant. I’ve been taking pregnancy test, they have been faint positive. I had bleeding for 3 days and after that fact I still got positive test. So I went to the doctor yesterday to clarify and I got a call this morning saying my blood test was negative. Here are the test, the bottom one is the oldest one. The top one is the most recent that I took today. Could this have been a chemical? Is there a possibility I’m even pregnant? Please help, I’m so confused and scared. This would be my first baby and I don’t want to go back to the doctor because I’m embarrassed. I just feel like I’m pregnant and these test say I have at least some hcg... or am I tripping. Please help...