I know beggars can't be choosers but I really want to die in my sleep and money is kinda of tight, any suggestions for cheap (under $20) or free (using basic household things) methods where I won't know what's happening.
i hope you find what you're looking for but if i can offer that cheap or free methods are frequently ones that have a low probability of success.
if you haven't already, i would encourage you to take time to read through the various methods megathreads - many which are listed on the resources page. after spending some time there you'll be able to best make a decision on a method that matches what you need, from cost to success rate to pain avoidance.
i don't know much about hydrogen sulfide but given that it isn't talked about much in this forum leads me to believe there are problems with the method (i'm wondering if it might be difficult to be sure of getting it in high enough concentration for instant death). also, be careful about the source of info - a wiki is definitely a place to be extremely skeptical since anyone can edit the info.
best of luck to you.