Go to a couple of your "big name" tyre places and just double check with them. Also the place you got them fitted and just make sure they are still in good condition.
Get your balance and camber checked as well. A mate of mine got pulled up and one of his rears was bald on the inside. Someone had messed up the balance and camber last time he had his car serviced and it just ripped the tyre apart.
And last. Get a tyre gauge. Or some matches. If you stick a match into your tread and you CAN NOT see any of the red head, you should still have enough tread on the tyre. Also learn where the tread depth mark is on your tyres. There is usually a small triangle on the sidewall. If the tread grove is broken, meaning the depth mark is flush with the tread, then it is time for some new rubber.