I was confirmed this spring in the Catholic Church. At the time I really shouldn’t have gone through with it because I was doubting my faith, not in Jesus or God, but in the Catholic Church. I went ahead with it basically to please my parents. I am still investigating my faith in the Catholic Church. I was wondering since in my heart I didn’t really know if I believed everything the Catholic Church teaches, if my Confirmation in the Church was still valid?
Doubts about the faith do not render the Sacrament of Confirmation invalid. It could be that you received the sacrament illicitly (e.g., you had not been suitably instructed – see Code of Canon Law 889.2) but this would not affect the sacrament’s validity.