Yes, perhaps you should have given it more time.
Finding a compatible therapist is not easy. (See JayCeeKy.) But how many years — or decades — did it take for you to get into this psychological mess? To get to a point where you are convinced that your belief might be wrong, as you say, but dammit it’s your belief and how dare that professional presume that the truth would serve you better? (Do you do your own plumbing, car repair and home tech servicing?) It won’t take as many years — or decades — to get out of your mess, but it will certainly take considerable time.
Especially when you dig in your heels and resist.