I can tell a story too
Once I was just riding and nando didnīt make his job like he can and I was very very stressed. An then I took a riding crop though he really is scared of these things an hit him
It wasnīt that strong BUT it was a hit and I was so sorry for that because he didnīt deserve it!
Itīs not exactly the same like yours but it just remindes me of this.
It happend a long time ago buit I still feel very sorry for that...
I think you shouldnīt feel so guilty about it because you are sorry about it and that's the main fact! I think yout horse will not be resentful about that.
It just has happend and now the only think you can do is feeling sorry and so do you do
I think everything is alright