This. But not quite so harshly, no what you took last night won't effect you, and doxylamine is just a regular OTC sleepaid antihistamine like diphenhydramine, it'll just make you tired, it doesn't interact psychoactively with cannabis.
In my signature is a link to the CD Directory, you can check out our MEGA thread about combining various drugs with cannabis.
This is closed, but PM me if you have any further questions.