To continue or not continue?

Since the beginning of Septermber, I have tooken into consideration the whole "career" issue. Ever since the age of 7, I've dreamt of saving animals and being a vet. My marks weren't that great, so I went into Animal Health Tech to be a vet nurse. Now half way done, other options randomly came to mind:occupational theraphy, medical imaging tech, a bach in social work, child youth worker, special care councellor.. Etc. I've decided that it would be best for me to take a semester off to decide, giving me two months to apply to another program after Dec. I feel the need to reevaluate my options, save money and I'd love to do volunteering. Some people have agreed and some people have disagreed. I dont want to start working when I'm 30 either! But I need to graduate from cejep and university. I'm only 19 right now. I need to hear other opinions maybe?