✿.K.
Aww Sorry honey :( if you lived near me I'd say bring roman over and I'd watch him so you could sleep.
Everyone reacts differently is there a warning on the bottle that says caution may cause drowsiness don't drive or operate machinery until you know how it will effect you? If it has a warning I would wait to take it go sit in a steamy bathroom it will help loosen things up. If it doesn't have a warning I'd take it but take the smallest dose if it doesn't make you sleepy and doesn't help you can always take the rest (ex. Benadryl says take 1-2 tsp for my 10 yr old if he takes 1 tsp and it doesn't help he gets that remaining tsp)
You sound like you got the nasty cold my hubby had last week :( I hope you feel better very soon!
Edited: http://www.mucinex.com/pdfs/mucinexDM.pdf