Sleep stretches 10 and a half week old

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Ok, so this is a tad embaressing since this is my 3rd child but I really need some advice. My son will not sleep more than 2hr stretches at night and its killing me now! He is my first breast fed baby ( there were reasons ) and I'm wondering, is this normal? How can I help him sleep even an hour longer? If he was my only baby it would be less hard, however having to be up all day with my other 2 I'm slowly dying!! Im not looking to be told "hes still young blah blah" I know this, I'm not expecting 8hr stretches, just a little longer than every 2hrs. I'd even be happy with 2 and a half at this point D: