When I was doing manual hand exercises I also felt my dick was getting shorter from jellqing, but I also wasn't stretching in the same day. So I just stuck to stretching, but I can now stretch my cock far and have great length gains, but I noticed if I pump and jelq it's the best for girth...
Maybe look into different tantra methods. I cum all the time now, but one at one time. I was fucking everyday. And I never came for a whole year. I would always hold it, and direct the energy up. But. It issss important to RELEASE!!!
By all means go vegan! Look into going RAW VEGAN though, I was for 5 years. And it was the best shiz ever... You need to look at recipes and research it yourself though... You Tube has every thing you will need. Get your carbs in by eating massive amounts of fruit. And eat super foods...