well, youre endo you say right?
Personally for your size id say 3000 calories might be a tad too much, erm, im gonna try and explain what dan did to me, but hes much better at doing it.
Basically, if you start out a diet with 5000 calories, your body will climatise to it, and burn it off as best as it can, therefore you will then need to go to 5300 to start making gains again, the body gets used to it, 5600, etc etc
and eating 5000+ calories a day is hard, trust me-ive done it
Start off with 2500 calories with the split cycle from me, and keep checking measurements and weight every 2-3 days, if you notice weightloss, dont panic-it might be fat, cycle 1 is meant to lower fat and gain some muscle, check your bodyfat, this could be simply from looking, or doing the actual measurements
Bodyfat can be measured under MANY methods, some will make you 5%, some 15% (lol seriously lol) however this minor ish innacuracy does not matter, if a weight scale is out by 5lbs, itl show you as 145lbs, when youre really 150lbs, but if them scales show you being 150lbs, it means youre 155lbs
same goes with bodyfat, use the SAME method, that way you can track CHANGES, rather than a "true" total bodyfat.
Hope that makes sense
BTW i used caps because i cant be bothered to keep pressing the italics icon
Not shouting at you lol
However, if you notice weightloss and its definitely lean muscle (which should take a while anyway) add the calories in increments of 200-300
Never increase calories too fast or too much, 2-300 will get the bodies attention, a calorie can make 1cm^3 of water raise by 1 degree, therefore 300 extra calories means you could make a standard 500ml drink bottle raise by 6-7 degrees, quite a lot of energy eh?