You have nothing to lose by applying to a couple of universities that ask for one or two grades higher, just make sure you also apply to some with lower entry requirements as back up. My predicted grades at A level were BBB and I got 2 offers asking for ABB. Good luck!
It can't hurt to apply above, but only if you have sensible predicted grades. If your predicted grades are already quite a bit higher than your AS grades (without extenuating circumstances) then it might be best to err on the side of caution.