After going to the chiropractor it is a very important thing to place ice on the area's that were adjusted. This will help them not to become swollen and to stay in place (according to a chiropractor I have seen, and this does make sense.) Be extra careful today to stay in alignment. Put your son in the stroller today.
No I don't have any medications to recommend, but the ice should help. A doctor might prescribe you a muscle relaxer, but that has side effects of drowsiness, and won't help you in the long run.
After you have used the ice and feel a little better, please look at this page.
http://www.helpguide.org/mental/stress_relief_meditation_yoga_relaxation.htm (this is actually my favorite website - moreso than the other ones I gave you above)
It gives instructions on how to relax. For today just focus a little further down on the page where it gives instructions on how to deep breath. Then practice this. It starts off having you practice this while sitting, but after awhile you can do it while laying down, if you are tired. Lay on your back though, and try to have your spine straight and your body in alignment. Try the deep breathing in this position. This is really a great thing to do before starting on the yoga. When you do start the yoga, you may just want to do some really simple things like lifting one arm up as you are laying down as high as possible, possible above your head on the floor (keep good alignment) Practice inhaling slowly as you lift the arm, and exhaling slowly as you bring it back down to your side. You can switch between both arms, and then do them together. You can do this with your legs to a lesser degree of height. You should not stress yourself or push beyond what is easy for you at this point. Focus on the movements with the breathing. Keep your lower back on the floor.