Guessing is not a good idea, you'd be surprised at how much people underestimate. Here's what I would do:
Go to Google and type in "nutritional information for an avocado" and use the nutrition information to figure out the points on your calculator. Then search for the nutritional information for turkey, then a flour wrap, etc...
Obviously it doesn't have to be exact, but by doing that, it will give you a closer estimate of how many points you've eaten.
That's what I do when I eat out and I'm not sure of the points I ate. It has worked for me so far.