Chronic autoimmune inflammatory arthritis (like RA and AS) run rampant in my family and I myself have been dealing with lots of issues with my rib cage with cartilage inflammation and swelling.
I think there may be some truths to that article, especially related to stress. Our joints work hard everyday. Then add in all the stressors and changes in your life lately, the stresses of not having hubby close by, two kids, moving to a new country, etc and you're definitely a case for putting additional strain on your body in ways you didn't even realize possible.
Definitely get into a doctor, they can do a full work up on you.
Pain relief...the name of the game! NSAIDs (aspirin, aleve, advil) taken at regular intervals everyday, hot water bottles/heating pads on the painful joint (or those heat wraps that stick to your body are wonderous, most heat up and last 8 hours and you can still run around with the kids), light stretching to start and end your day., and regular naps everyday(ha, right with 2 kids, hardly!!!), yoga, and physical therapy. Some other things that have helped for family members are to reduce inflammatory foods in their diets (eggplant, tomatoes, refined foods like sugar, white bread, etc, gluten, etc), and adding in fish oil capsules, glucosomine, chondrito, and adding more cinnamon, peppermint, ginger, cumin, chilies, and spices into food. How much these really help or are placebo is debatable. I've tried lots of these and it has all done little for my inflammation. But it makes them feel better, so that's all that matters.
Good luck, joint pain sucks so much.