Irishgirl, I think you need to get a second opinion. In addition, get copies of all your lab reports so that you can follow what has been happening, all along. You might want to even have the doctor repeat the colposcopy. There are women whose doctors have actually dilated them to have a better look inside the endocervical canal. This sounds like a great idea to me. When you have another colposcopy, insist on a block. There is no reason why colposcopies should be painful. If doctors needed a biopsy, would they honestly let another doctor cut off a piece of tissue without some kind of numbing agent? Shots can be uncomfortable or even hurt, but the discomfort ends very quickly.
You might also want to take into consideration the doctor may have injured you, during the exam. Check to see if he pulled something or if he impacted your cervix.
There could be a number of reasons for the bleeding, so make sure the new doctor checks all possibilities.
Banthaman, most cases of dysplasia actually don't turn into cancer. LGSIL generally clears itself up. With CIN II, 40% of the time it regresses, 40% of the time it stays the same, and only 20% of the time does it progress to CIN III. Obviously, CIN III is a more serious problem and needs to be addressed quickly. But the ACOG did a study to gauge the actual percentage of women with cervical incomptence, (It's 7.9% with LEEP, higher with cold knife cone biopsy.) so they have set down guidelines about managing CIN I and II in very young women. I think what doctors should be required to do is an HPV-DNA test. That way, the doctor and patient would know what they are addressing, and how to manage it.