Another WW member - you speak my language!
Do you have 10 points left before your activity points? If so, you
definitely should be eating all of your daily points every day. The WW plan builds calories/carbs into your points to include the "free" veggies and fruits (but make sure you don't overdo it on those; especially fruits. They can sneak up on you and majorly stall your weight loss), so you don't want to count them at all toward your daily count. So if you have 33 points per day, for example, make sure you eat all 33.
Then, look at your activity points. I have my app set up so that when I eat over my daily points, it takes from activity points (I think the default is to take from the bonus points, but I never touch them). First of all, if you're not eating your daily points limit, try that first before digging into activity points. But if you're eating all your daily points and have 10 activity points per day, you should definitely be eating some of those back. As a general rule of thumb, if I have a 3-4 activity point day, I may eat 0, I may eat 2. But if I"m over 5, I typically eat half of them back. So that means if you have 10 activity points, eat 5 of them.
That's worked for me, but everyone is different. I've also gone days eating fewer points, then on the weekend I eat 6-7 activity points' worth (which scared me at first) and ended up losing
more those weeks. You don't want your metabolism to get in a rut, and if you're not eating enough you could definitely be doing that. I also had weeks where I had only 25-30 activity points, and some where I have had 40-50. The trick (for me, at least) is to change it up and keep your body guessing (but always be active).
Do you have an ActiveLink? Ironically, more than 5 months into the program and I just got mine two weeks ago (I'm 4.6lbs to goal, although I want to lose another 7-9lbs after I become a lifetime member...although I may skip the 6-week maintenance and just convert back to MyFitnessPal, which I used to lose 30lbs last year). I have loved using this thing so far, though. It challenges me to keep moving, and it's a great motivator!
Hang in there - it's a long process, but you'll find what works for you!