Should I go see a doctor or heal this on my own?

I got into a car accident, which some of you know from my other posts, a few days ago while on vacation with friends. My shoulder was hurting because of the luggage I was carrying around with me. I went to work after I finally got home and stayed there until 7 am for my shift, then came home and passed out until 9 that night. I’ve been up since 9 PM Monday night (it’s 11:34 PM on Tuesday here) and can’t sleep. The pain in my shoulder seems to be intensifying and radiating up my neck a little bit and over my shoulder blades to my spine. I know I have lower back problems, but my lower back is unharmed. I also have carpal tunnel in both wrists, and tendonitis in both elbows and both knees.

Could this injury still just be from carrying bags? I normally get injured when I go on vacation and have to carry luggage, because I’ve pulled my rotator cuff muscle a few times on one side.

Could it be from sitting up all day? I’m leaning against the wall while sitting on my bed, or sitting hunched over my computer when my pack hurts from the wall.

I normally go to a chiropractor for these issues, and I’m not sure if I should now to at least get it checked out.

I also have a blister about the size of a dime on my right pinky toe, with two popped ones on my left foot, one popped one on my right foot, and another that is just forming on the inside of my right foot. Should I get them checked out by a doctor, too? The toe and inner foot blisters hurt most, and I can’t walk on lean on my foot when sitting down.

Should I go to the doctor and chiropractor to make sure everything is okay? Or just self medicate with ice and pain medications until it heals up?