Don't lose hope! It will come off!
44 lost so far is no small feat. You know you can do it and it will eventually happen.
Most people plateau at some point if they have a lot to lose. The most likely reasons are that your body has evened out food and exercise and reached a stable metabolism, and that you are holding in water. Water retention has been known to last for more than 6 weeks!
To get past the plateau, do 3 things better.
1. Drink water regularly. Try to drink something like 2 liters every day. Eventually it has to start coming out properly.
2. Log everything you eat. And I mean everything. You seem to do a good job, but really make sure you are getting amounts and weights correct. You may be over-eating and not realize it.
3. I see a lot of the same, short exercises. Your body could use a break from monotony. Get a new exercise video, try to go swimming, hike in a mountain instead of walking. If you can't change it up easily, add 15 minutes to every exercise for 2 weeks.
Lastly, you were at 83% RDI last month. While a good gauge, the RDI is not perfect. If you shoot for 75% this month you will see the difference.
The right decision at the right time.