I did not know what would happen if I purchased an exotic shard with strange coins to upgrade my Thorn, so I just went ahead and did it hoping it would just complete the rest of my perks. Instead, it reset everything. I really don't know what to do at this point other than loath the game an my lack of friends to help me with this kind of knowledge. I tried looking it up online, but people's explanations didn't make sense. It would be amazing if Bungie compensated the misunderstanding or if somebody could help me.