I'm a 40 year old single mom of 2. Both under age of 10. Was 265 at my biggest, post baby 2. Down to 145- 150 work out daily. Mostly yoga/ core performance/cardio I'm so worried about healing right and quickly I don't want to buy the wrong things and "hurt" myself or my wallet. Any ideas? My Dr's coordinator suggested looking on line. What size do I get? What's a typical one cost?