You could be surprised with yourself!
I'm not a nurse but I do a lot of personal care in my current job in care. I didn't think I could ever do personal care, but now it's second nature to me (hate to say it, haha). I have no problems doing it, but if you'd have asked me a few years ago, I would have gagged at the thought! The more you do it, the easier it gets - from my experience anyway. To me, it's just a natural thing now haha. & if you can wipe your own children down, you're halfway there. Sometimes the thought of it is a lot more disgusting/daunting to what it actually will be!
If Nursing is what you want to pursue, then don't let this stop you/deter you IMO!