Why did drinking make me so ill?

It is quite strange you got ill after just 3 drinks! If you were drinking on an empty stomach this could have made you ill, especially with all the cream in the pina coladas, just the thought of it makes me want to puke 'I hate creamy alcoholic drinks', Mixing your drinks is a bad idea as well, try always sticking to the same drink all night. Failing these two options, is it possible that your drink could have been spiked because still feeling sick two days later doesn't sound too good!