Hi Shew
Welcome to the thread. I'm WillStillNeedTeaAndGin on MyMFP. I'm a 2:5er too. We don't seem to have a "thing" on this thread .. some intermittently fast, some exercise, some count calories. We mostly use MFP (but not all of us).
I tend to assume that a cup of tea (yorkshire of course) with skimmed milk is 7 calories. I don't account for my peppermint tea or any black coffee I have on a fast day because I tend to go for broke on fast day and do some exercise.
I work on the assumption is there is no milk and no sugar (and it is tea/coffee) it's free.
Lizzy I seem to loose weight for 8-14 days in a month and then feck all the rest of the time. Tis tough. But get your inches measured because I do tend to use them as a motivator in between weight losses. Don't worry too much about the weekend - my terrible couple of weeks has come at the cost of 1 lb up (though I was 3 lbs up on Sunday). So it seems though I still don't believe it that it might actually be ok in the end!
Will be fasting again Friday as we have visitors over for the weekend, and then I shall be officially back on IT with a view to getting to the final resting point when I might do a Bssh and buy some new clothes. My norks are still badly held as I haven't yet bra hunted.