I think I'm getting DDoS'd

I'm in a ranked game right now. I was performing pretty well: up on cs, solo kills on lane opponent, denying jungler when he comes, pulling off ganks with my jungler, helping other lanes. then i got disconnected. I'll reconnect and play for maybe 30 seconds, and then get disconnected again. Now they're making gains on turrets and inhibitors, when before, all 3 outer turrets were standing strong on our team. Some members of my team are accusing me of trolling. In everything I do to test it, my internet is working fine. Even the client is working fine, I'm just disconnecting from this game over and over. It's not right. Please help.