What... This is really confusing... Your taking the xanax at 6pm which take 30-60 mins to kick in for a few hours of sleep then mixing LSD + Dxm about 4 hours after taking the xanax? Just sleep now and make sure your healthy and ready to trip. Is it real lsd? I know rcs like 25i and dxm is very bad because the effect serotonin and you can easily get serotin syndrome. Why not just take the lsd? Its just as fun by itself and you won't have to worry about health complications.
Oh also xanax is a sedative while lsd is stimulation, meanig they will counter-react eachother.