How much pushing is too much?

[weknowhowtolive]

I play pretty low stakes and do not have SNGTP....but I feel I pretty much know when pushing a hand is going to be +EV or not.

My problem is, if I pick up 99, AKs and A8s in that order, with 4 people left, say I have an M of 7, and everyone folds to the first two pushes...should I be folding the A8s?

If I picked it up first and hadnt pushed in awhile, it would be an easy push....but after two other pushes i probably look pretty maniacish.