Candicet, when you get in to see your specialist about your colitis, ask if he / she also do a blood work up. If not, then your general practitioner can give you a full physical and bloodwork. Your body is telling you it's time to get a full work up to put your mind at ease or to find out what is causing the body aches and exhaustion. Easier to treat a problem while it is still small or minor. Did someone tell you that you need B12 injections?