Tell him you have lady prblems babe!! Male bosses can't cope with stuff like that!! bet he lets you go!! Or just sit there whinging and he'll give in eventually!! Hope you feel better soon hun xxx
He can't make you stay if you are ill, everyone is entitled to sick leave its in your contract (you do have one don't you!)
He should be pleased you made the effort to get in in the first place. If he point blank refuses fake pass out in the front of him and he will feel really bad then!!
Tell hi you have just thrown up in the toilets and you are not sure you can make it there the next time as you are still feeling queezy. Then do the crying bit make a show of blowing your nose and coughing hard should help.