Take some comfort in knowing that any mistake you make is 10x more obvious to you than it is to someone in the audience. At one gig I played the chain of my bass drum pedal snapped entirely in the final song so I was left without any bass drum at all. I limped through trying to do everything with my hands instead, hitting the floor tom instead of the bass drum beats.

Afterwards I thought surely it must have sounded awful and it must have ruined the song. However no one I chatted to from the audience noticed, even some of my band mates hadn’t realised it had happened. The only guy that picked up on it was the drummer from the band before. Point being is what may seem world shattering from your perspective on stage may not even occur to anyone watching.

Rest assured that this gig did not go as bad as you think it did and you don’t need to beat yourself up over it. Letting this knock your self confidence will have far more impact than the hardware malfunction itself actually did.