Wow! Your success is very impressive. What a wonderful job you've done. I hate to see you get frustrated now after all your great work. Here's a few suggestions.
First, stay on all the capsules until you reach your goal weight. That will help get rid of the 4 you gained and get you back on track. In addition, try to exercise with more intensity -- not longer, harder. That will help burn a few extra calories.
The body gets accustomed to a certain level of exercise and so it's actually becomes less efficient. In addition, as you lose weight fewer calories are burned (it takes less effort to move a 300-pound object than a 200-pound object, yes?).
Keep your calories at the same level until the check-ins tell you otherwise. Dropping too low only slows weight loss more (strange as that sounds, it's true; see the top post on this list for more). A final suggestion is to weigh and measure what you eat and drink for a week to be sure some extra calories haven't slipped in along the way. It's easy to have a little more here, and a little more there without realizing it. Then it adds up, and the scale goes up as well.
I do hope this helps, and please let me know if you need anything else.
Pat Baird, MA, RD, registered dietitian