I’m confused 😩😩

So I got my period on February 5th and it ended on February 9th. It was heavy the first two days where I bled through the tampon but the last 3 days it was pretty light to where I almost didn’t need a pad or tampon in. The last few days since then I’ve been having the urge to pee but when I go nothing happens. Sometimes when I do go it burns a little but that’s only happened twice. I just went the the bathroom and when I wiped there was blood but it was pink. Is it possible that I could be pregnant? I just took a test on February 2nd and it was negative but I’m confused what this could be from.