I empathize with your pain as I have been through what you are dealing with many many times. There has already been some very good advice given. The Ma Roller can work wonders and requires minimal effort to use. The very best stretch you can do some others have described and I’ll give my version. If you are unable to do it yourself you can ask another to help you do it. Lay flat on your back with your arms outstretched at your sides. Pull up one knee at a time and when that one knee is up as high as you can get it, pivot/roll that raised knee to the opposite side of your body, keeping the shoulder blades flat on the ground, and just hold it there. It will hurt, but that is because you are stretching the tightened muscles that need to relax. After you have done one side, do the other. Repeat this a few times and do it a few times a day. Like I said, ask someone to help hold your knee up as you roll it over.
Be careful with the Tylenol. It can and will damage your kidneys and liver at those doses for any prolonged length of time. Naproxen works FAR better. I also suggest a Valium to relax and if the pain is bad enough get some oxycodone. Both are highly addictive, but they work! Being in pain is NOT conducive to healing. Just make sure to quit taking them ASAP!!! (Or you will either lose everything, or end up in some sort of recovery program) best of luck, and ask God for healing. I’ll pray for you as well!
I’ll also add to my post that I fully agree with what OilLineRebel said about sciatica being a mechanical problem. It’s nerve pinching. That’s why the proper stretches and the Ma Roller can and will help line everything back up and give you the relief you seek. What DIDN’T work for me were chiropractors, acupuncture, or steroidal shots. I’ve avoided all recommend further surgeries and have maintained a healthy back (despite my fused vertebrae) by most importantly and simple, just maintaining good posture! Sit up straight! Healthy eating habits, proper weight, and daily exercise are paramount, but just maintaining good posture will almost positively prevent further episodes of sciatica! It is so simple that it’s easy to forget, and then the slouching starts, and the cycle repeats.