Never give up on a pot, at least not for several months! Petiolaris and tuberous species may take up to 1-3 years, and other species although not as demanding of patience as these often can produce surprises. My Drosera arcturi just germinated after 4-5 months. Generally, 2 weeks is considered fast indeed, and 4-6 weeks is not uncommon. Be sure that you do not top water or the seed will be buried, and give as close to 100% humidity as possible. Growing from seed demands patience. With more information on which species you are attempting I may have more detailed advice.