Rush is huge swingament..
Anything can happen over short sample of hands
If you can feel your edge and u r sure that your swing is really variance's fault, then chin up and fight that bitch.. She ll release ya if you pwn her with volume
On the other hand If you dont feel confident about it, fuck the bonus.
Play games and volume that makes you happy and makes u feel like u r enjoying every hand.
I was chasing bonus on November/December last year and I went almost bustoo..
once again - everything can happen in poker