Could I still be pregnant? Please Help!

Hey guys I need opinions! I'm going nuts. Help! I had protected sex Aug 21, the condom caught all the ejaculation, and I had sex again Aug 28, no condom just withdrawl and he didn't cum inside. My period was supposed to come August 4th but it hasn't. I was barely spotting yesterday morning, like barely visible and at night it was a bit more visible. Usually my period comes 2-3 days late or early. I haven't had pregnancy symptoms. I just woke up & found spotting on my panties and wiped and there was blood! Definitely more than yesterday and it was a brighter red, could it be my period? I took a pregnancy test 20 mins ago with fmu and it's a very prominent negative!😀 I'm so happy because I'm not ready. Could there still be a chance I'm pregnant? What do you guys think? I'd appreciate your thoughts.
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