Hey Brock. I am also old and in my 30s. I've had my back go from random things, as well as deadlifting.
I can understand that getting healthcare can be scary for a lot of reasons but first and foremost, if you can without it being at great toll on you, visit your doctor, nipping these things in the bud before they go into something bigger is best for everyone, you and insurers included.
However here is some simply things you can do;
1. Heat = recover quicker. Place a hold water bottle on the affected area whenever sitting or lying down.
2. Little movement is good. Exercising your back best you can is good for recovery, it is the backbone of rehab for injuries. Start off at 10% usual weight then work.up from there
3. Relax best you can. Lay about in bed and binge watch Netflix, take ibuprofen and paracetamol for the pain and sleep as much as you can, sleep is gonna be difficult I know because it's surprisingly back intensive but grabbing any quality is good
4. Stop doing deadlifts. Getting a better deadlift is only good at helping you get a better deadlift. There's better and safer way to work your back and legs. Unless you like the powerlifting aspect, no body swear by deadlifts anymore in bodybuilding or in fitness
5. You'll feel like this will be it forever. It won't be, this too shall pass, chin up. Take in little victories. If it doesn't show any improvement (not completely gone, just improvement)after 4 weeks, see a physical therapist or doctor
6. chiropractor are quacks. Physiotherapists or doctors are better
This may seem obvious to all but I thought I'd mention just incase