So im on birth control. I take it perfectly every day same time. My boyfriend and i just had sex and after he finished in me and pulled out there was a little bit of blood. Should i be worried? I thought maybe because we havent done it in a week and friction

Probably just friction. Happens to me sometimes

Use lube and have more foreplay. I have the same thing (my partner and I are long distance at the moment) so when I see him and we have sex I bleed after the first time and after that it's fine.