I am a qualified Paramedic with 15 years experience and I wish that I had trained to be a nurse! There are much more choices of career path to take if you are a qualified nurse compared to being a Paramedic. I love the job, but there are few opportunities to branch out and do something else within the service. Courses are few and far between and we were expected to fund any further education courses that would benefit your skills yourself! (the service would consider partial funding of paramedic-relevant courses but you had to apply a year in advance and one of my colleagues actually studied cardiovascular care through the open university and asked for funding and was told that the course was not relevant to her role as a Paramedic!) I suggested that it would be beneficial for staff to carry out yearly refresher courses at a hospital (such as intubation and cannulation skills- especially for staff that were employed at particularly quiet stations, but this was dismissed)
Compared to nurses who always seemed to have lots of training and opportunities that they could attend or study in order to broaden their horizons.
I am seriously considering studying to become a nurse now, and if I were you, I would carry on with your nurse training and then if it is still not for you, go for your Paramedic training!