Occasional doubt in Buddhist Teachings

For about two years now I have been reading about Buddhism (Theravada) and have been trying to meditate and contemplate the Buddhist teachings. From this I have experienced some calm and a feeling of well being in my life but sometimes I feel doubt in this and fear that maybe I am deluding myself. I have been skeptical of religions for a long time but for past couple of years I have "experimented" with Buddhism since I found some agreement between Buddhism and positive psychology. How can I deal with these moments of doubt?