Food allergy. What is happening with me?

Have eating some foods for a long time on a daily basis. But since 1 month these foods are affecting face skin causing me acne and also affecting my bowel movements causing me constipated. These foods include wheat, nuts, eggs, jaggery, whey protein. I was intaking the above foods on a daily basis for 2-3 yrs. But now they are causing the above problems. I eliminated wheat from my diet after which my bowel movements are a lot better and are very good actually, I have felt like this in a long time. But the other stuff as I mentioned like eggs, jaggery, whey protein still affect me but they only affect my skin not my bowel movements. I have eliminated these foods from my diet too after which I can see that my skin has begun to clear and the breakouts have stopped. I want to know that will I be able to eat the above things in future or I have to eliminate these things for the rest of my life which is a very difficult situation. I want to know what is happening with me?