I agree that you should talk to your T. And first, you could do what Satsuma suggested, about asking what would lead to hospitalization. I'm under the impression (from asking my T before) that T's don't usually hospitalize for those types of thoughts. The fact that you have a date might concern them (though it probably depends on whether it's, say, 5 days from now vs. 5 months from now). I've heard that if you specifically have a plan AND the means to carry it out, then that could potentially lead to hospitalization, unless you make a safety plan with your T.