To DDoS without a paid booter and to do it off your computer is flat out stupid. Exposure risk? 100%. 99/100 times if you get booted it's probably off of a paid web based booter.
Easiest fix is just request an IP change from your ISP. If they reject, just unplug your router for a bit and plug it back in. Or just wait it out (Generally never lasts longer than a few hours at most) and play SP.