Hi Psychick - My kids are at about the same stage - older one has lost 4 bottom teeth (2 new ones are in) and the top two are on their way - little one has lost and replaced 2 bottom. With boys boys, their bottom two new teeth came in before the old ones fell out and I think they both had a bit of pain, but mainly from the new ones rather than the old ones - also, the old ones were pushed forward rather than up, so their mouths did bleed when the teeth eventually came out. they looked weird with 2 layers on the front. Elder boys next two came out with no complaint - but they have left gaps with no new tooth already there. Top two are now sticking forward and are not that wobbly really, but again, his new teeth have already come through behind the old ones - we may get a bit of drama when they come out.
It is costing me a pound a time - �2 already this week!