Finding energy for sex

I’m 15+2 and I’m suuuper horny but I’m always so tired after work. I work the night shift so I get home at 10:30 at night and after fantasizing about my husband all shift long, I pass out as soon as I get home and never stay up long enough to get some lovin’. But then I have these vivid *ahem*...dreams and I’ve come in my sleep like three times the past 2 weeks. Does anyone have a similar problem? Can I get any tips or recommendations for some energy boosting snacks to have at work near the end of my shift!