There is, unfortunately, no going back now. There are no half-way houses for yarn addiction and interventions by caring friends and family members are rarely successful. That's mainly because they all have their list of things they want you to knit for them.
Quitting "cold turkey" isn't an option, either, since a cold turkey only inspires visions of hand-knit turkey sweaters to warm them up!!!
I could tell from your purchase of a yarn swift and ball winder that you have become a serious knit-a-holic already. Your future will most likely involve an ever growing collection of gadgets and accessories as well as yarn.
And eventually, you'll be shopping for special furniture in which to house your collection. (I have a 7-shelf cabinet, curved-top chest and several bins, coffee cans and Pringle containers for needles already, along with a stuffed bookshelf and many files for patterns, etc..) From all indications, you will probably outstrip me shortly in that department.
You may not realize just how all-encompassing this addiction is, but it will become clear to you when you find yourself buying up boxes and boxes of gallon sized zip loc bags to protect your yarn stash from hungry moths.
No one you know will dare approach you with any suggestion that you might be going a bit overboard because you will always be armed with sharp pointed skewers and it won't bother you one little bit if some critic happens to fall on them. The needles and most yarns are washable so no harm, no foul!
Welcome to knitting, Dearie. Don't expect any of us to discourage your passion for the art form. All we'll do is egg you on!
Power to the knitter!