Fist Stone - Please Help

I am currently trying to pass my first (and hopefully last) kidney stone. On Friday, May 1st, I had my first pain, which prompted an ER visit and the discovery of a 3mm stone "high up" They gave me Toridol in the ER and a prescription for Ibuprofen 600, Tylenol w/ Codine, and Tamsulosin. They told me to keep a steady stream of pain meds in until I pass it. I didn't do that because I didn't want to take pain meds that frequently and I didn't have that much to begin with. The pain was really only that first night, and nothing eventful happened again until Mother's day on Sunday when I got the urge to use the restroom constantly. It was like that until Monday night when I started having horrible pain and threw up 2x. We went back to the ER. By the time I went back, the pain had stopped (it lasted about 3.5 hrs.) They tested my urine for infection (all good there) and prescribed me more Tamsulosin since I was out, and Toridol, and Hydrocodine. I had more pain Tuesday night, but not bad enough for me to get sick again, and the feeling of needing to use the restroom constantly is back. I barely get anything out, and it smells. Idk if it's because I've never had one before, but I am scared im going to have in infection or something and not know it. I can't constantly be going to the ER. How do you all do this?!?! Am I overreacting? What can I do to help pass this stone and get this whole thing behind me? How do you know when to go to the ER?