The flower is reacting to the pollen, but it will be a few weeks until you are sure that a seed capsule will form, and even then you may find that little or no viable seed is produced. You just have to wait and see. Repotting now or in the next couple weeks shouldn't interfere with the process as long as the plant is healthy. You may lose the remaining flowers, but as long as you find healthy roots and treat the plant gently during the process it really shouldn't affect it much.
The process of growing orchids from seed is long and complex, so start educating yourself ASAP. Good luck.