I feel so bad about this?

Ok so I started my period I told my brother because he my leagel guardian. So he ttook new to bye me stuff( I had a pad on btw) when w got to rhe house I got out and saw (he saw to) a nlood stain on the seat of the car I said dorry he said it was not a big deal. But I feel so bad. He told me go clean up and im cry I feel so bad (fyi he a nurse)e