Definitely wait for SN. Those drugs are made to not be able to overdose reliably. People still think they can overdose on sleeping meds because they don't know the difference between the old barbiturates no longer prescribed and modern sedative-hypnotics like benzos and z-drugs. Celebrities of old who died of sleep med overdose, like Marilyn Monroe, it was Nembutal not the modern pills. So don't be fooled by popular perception. If you overdose on the meds you mentioned, at best you will puke or sleep for half a week, and at worst you will sleep long enough for your family, friends, neighbor or landlord to get worried and call for a welfare check, upon which you will be admitted to a psych ward.