If you were tempted to doubt but stopped the thought, it is neither!
Seriously, you have gotten some really good replies here. Read them over and apply what advice seems to speak to you the most.
It is normal to have doubts, especially when we are younger and are “making our faith our own” rather that that we just accepted whole cloth as children. The adult faculty of thinking is an important part of our responsibility in growing our faith. In my opinion, that needs to be accompanied by prayer and study and frequent reception of the sacraments of Reconciliation and Eucharist.
Even as an old person, I sometimes have doubts. I consider these as temptations and just disregard them and say a prayer. These are the work of “old scratch”. That is probably true of younger people too, although I do not remember that so much back then.
When I say study, I mean getting in adult ed at your parish, be it bible study, other offerings, reading the Sunday scriptures ahead of time and meditating on them. Also reading books on Catholic/Christian ideas. My own attempt was to read the most difficult books I could understand. If you are near a Catholic college, you could also take a course, perhaps even online.
The Rosary is a wonderful prayer, especially if you use it as a form of meditation and ask the Blessed Mother to help you know her Son better while praying it. Mary always takes us to Jesus.
And as someone mentioned, asking God to increase your faith is a good daily practice. When saying the Rosary, the three Hail Mary bead at the beginning are related to Faith, Hope and Charity, the three cardinal virtues. You can say before them in order: I believe Lord, help my unbelief; I hope Lord, help my lack of trust; and I love Lord, help my lack of charity.
God Bless!
