Periods and pregnant?

Amanda • 27 ttc for #1

I know it's not common but can you be pregnant and have a short period? Like a one day period? And a negative hpt?

I keep having this pregnant feeling but I had my period but it was only one day of actual flow then just spotting. I took a clearblue test idk if that matters or not but I'm just curious or is it just a weird period and normal? I'm confused by it and a little worried is all