K.D.
If done properly with attention to alignment you should not be sore all over almost every day from your yoga practice. The Yoga Sutras of Patanjali state "Yoga is the ceasing of the mind fluctuations" or calming the "monkey mind". This comes as a result of the asanas or physical poses when done mindfully and with great attention to cause and effect. Your yoga practice should be observed by a teacher of yoga so that they can tell you what you are doing to cause the soreness. Even if you can attend just one class - I realize that being a Mom doesn't always allow for time for yourself, but in this case I strongly encourage you to seek out a certified teacher.