Hello BP,
I think most people would have experienced ups and downs during their training, myself included. With respect to your question and from my own experience, I would, if you can is try and keep moving forward. If you take time out it will only put you on the saw tooth learning curve, and it could end up costing you more money.
One thing about the whole job thing, is you never know what is around the corner. It was only the other day when the Captain I was flying with said to me, do you remember when you were flying your little C152, teaching, will I ever achieve my goal of flying airliners? It brought it all home, and, I had to agree as I looked down the the PFD seeing London Heathrow on the ND! I know it is easy to say, but have faith in what you have set out to do, and if you are determined enough, all your dreams will slot into place eventually.
All the best with your flying mate.