Sickness

I know that along with pregnancy comes a heightened sense of taste and smell. Well I'm not pregnant but I've been on the patch for four months and am well adjusted now. (it was a terrible hormonal ride of sickness) But I've noticed since I started I also have a heightened sense of taste and smell. There are foods and smells that I used to like and now find revolting it makes mi appetite go away. Any explanations or someone going through this as well?