Hmmmmm.......

Your Doctor told you to lose 7 pounds? What exactly is plus a few more? I read that you said 10 more to go, but in all honesty the extra ten could go at any time, or never. As we age, things tend to change on or bodies. Sorry if it sounds like I am comin at ya, but that sounds odd to my ears....

Also, have you maybe faced the fact that short of starving yourself, or doing something dangerous, that maybe 145 - 150 is where you may stay, at least for a while?

What are your lab tests like? Lipid panels etc...

Also, you said Hypothyroid....is it possible this medical condition, coupled with the excersise is keeping your weight up? As you excersise you build muscle mass, and that will weigh more than fat lost at the same time.