I'm seeing a couple of things here that concern me... first of all, the leaves AND the stem color is saying she's pretty stressed over something - and I'm looking at your nutes and seeing that the Mega Crop 2 Part B has MASSIVE amounts of nitrogen - actually, it's pretty much ALL nitrogen... and this is where I think your problem lies. In flower, the plant just simply doesn't need as much nitrogen as it does when it's in veg state - it needs SOME - but not a lot. Your other nute - the Mega Crop 2 Part A is a MUCH better nute for this phase and, if this was my grow, is the only one I would be using... Too much nitrogen will lock out other nutrients such as calcium... since you're growing in Coco, I would suggest you give her nothing but water for a few days and then start her back up on nutes - but WITHOUT the Part B nutes... You may still lose a few leaves for a while as she clears out her systems but then things should settle down and she should be a happy camper (and you, too!)
Good luck!