3.5 weeks into flower not sure what is happening any help much appreciated

using earth juice full line grow bloom meta k catalyst hygrozyme and hybrix molasses not sure what to do here thanks

either you did something weird and they are finishing early or you have a calcium Magnesium deficiency...Try Using CAL-MAG From Botanicare or CALiMAGic from General Hydroponics....another thing might be that your feeding to strong of nutrients...Check your ppm in your res...if you dont have a ppm meter....try going half strength nutrients. also make sure your at least 12 to 18 inches from your HID light.
Hope this Helps

is that bug poop on the first leaf

have any N.. or just bloom P and K? Plants need N all threw Bloom , just not as much as in Veg. but you cant cut it out 100%, the plant will eat its self.