My guess is you've got nute issues because of your pH.... 7 is pretty high, especially in flower and some important nutes aren't readily available to the plant at that pH. You need to get it down to 6.2 as a "sweet spot" in flower....
If you've got a lockout because of your pH, just throwing calmag or dolomite or whatever at her isn't going to do anything... You're going to need to flush her out (3x the pot volume of pH'd water - so if you're growing in a 3 gallon pot, that means 9 gallons of water through her). Test the runoff of that water to make sure you've gotten the pH in the runoff down... Then, after she's dried out from that, you can resume your nutes at 1/2 strength for the first feed. One thing I like to do with my soil grows is to topdress with 1 tablespoon of Langbeinite 0-0-22 once a week throughout the grow... that seems to help completely avoid calcium deficiencies (as long as the pH is controlled) as well as obviously giving a good boost to flowering.
Good luck!