Dull Blade

My blade is dull and I don’t have another blade. I tried cutting my wrist and it would barely tear my skin. I did it so many times and it only bled in like 3 cuts. So I dug in with more pressure and it was only one tiny blood bubble. There used to be 3 other blades laying around the house because of my dad’s job. The blade I found I took it and with that one there were a few blades with that one, but at that time I had thought that I wouldn’t need the blade for much. But I fell in love with the pain of the blade pressing against my skin. I’m not sure where to search to find another blade, or how to make the one I have sharper.