Sore Elbow Joints

I woke up the other day with one of the joints of my elbow being sore. I went on a walk to the playground with my boy. I was pulling him in a wagon, but I was also lifting him and playing around with him. By the end of the walk the pain went away.

Now I keep waking up with both elbow joints aching and sometimes it doesn't even go away by the end of the day. Sometimes I'm not terribly active though. Just the activities of running around with my boy and taking care of the house or running errands. I may occasionally get sick of it and try to move around a bit, hoping it will help. Any ideas of how to care for it, or who to see?

I'm a 29 year old female. 5'9". Taking escitalopram and bupropion.