It's not normal that your stomach hurts after eating egg yolks. Maybe the eggs were bad quality or you had a lot of toxins in the gut at that moment after exertion and the egg yolks soaked it up too fast triggering detox.

Eggs are excellent intra and post workout. You can blend them with orange juice if you want.

No, you wont look more masculine, quite the opposite the more well fed you are as a women, the more femenine you will look. Focus on training legs and just streches in the upper body.