Can’t sleep ,ever tired Happy Dreams?

first .. i have GAD(anxiety). okay and i went to an event with loud music and fun.. havent done that in a while. in adition i take GABA for my anxiety..i have been taking it for about 3 months. past two nights after the party ive only gotton 5 hours of sleep.. any advice .. or why ??? last night was little better then the night of the party..please help.. thanx best regards