Sweating During Sleep

For the past month or so, every morning I wake up, my head and neck are very sweaty. It is summer, but we keep our a/c on every night, and I never remember having this problem before. There is a very good chance I have sleep apnea, because my bf says every night I snore until I stop breathing for a bit, then I shoot up out of bed gasping for air several times a night. (i have not been diagnosed.) I was just wondering if anyone knew if the apnea might be causing the sweat, or if there's something else that would cause this. I rarely drink caffeine, but I do smoke about 10 or so cigarettes a day. Could it be the cigarettes? I have never gotten this sweaty head stuff before.