HPT versus blood test

Danielle
This may be a stupid question, but this is my first pregnancy so I'm just overwhelmed... I took 4 pregnancy tests over the span of the weekend (3 days), all positive. My first doctor's appointment is October 8th which I will be approximately 8 weeks. Is it necessary for me to go get a blood test to confirm pregnancy? Or should I just relax and trust the HPTs? I am still so in shock that I still can't quite believe it, I still think I will just stop being pregnant! Silly, I know! Just feel like I might need reassurance or input. Thanks!