Bowel not clear. gas , and frequent.

Usually, I go for a bowel movement only once a day when I'm at home. But in the morning before going to the office, it doesn't feel completely clear. After having tea, I feel the urge again and pass a little more. Then, after having my lunch at the office, I feel a strong urge to pass stool every day. But I hold it in. However, after I return home, that urge is no longer there-instead, I feel hungry. There was a time when I used to have a complete bowel movement once in the morning and didn't feel any pressure the entire day. Now, out of fear of pressure or urge, I avoid eating anything outside... My stool not clear like before.. For the past few days, I've been having a problem where a lot of gas comes out during bowel movements, only a small amount of stool is passed, and the bowel doesn't feel completely cleared. I also get abdominal cramps before passing stool... Please help or suggest something