Hello,
I can understand your concern. Breakthrough bleeding(bleeding while taking the active pills of combined oral contraceptives, or other hormonal contraceptives),spotting and changes in menstrual flow are common side effects after starting the oral contraceptives and they are frequent while taking the triphasic contraceptive(orthotricyclen). Breakthrough bleeding is most common when a woman first begins taking oral contraceptives, or changes from one particular oral contraceptive to another. Headaches, weight gain and dizziness are other related side effects.
Usually these symptoms cease after two or three cycles, but if they persist then you have to shift the birth control pills to some other brand or use a different method of contraception like condoms. Hence I sincerely suggest you to wait for the subsequent one or two cycles and if the symptoms persist then please consult a gynecologist and switch over to other forms of contraceptives.
I hope that helps. Take care and please do keep me posted on how you are doing or if you have any additional doubts. Kind regards.
Edit **
I've also had severe headaches.. they are very painful at times.. where I can barely shower.
and I didn't mean to say two weeks later for this period.. I only meant a week or around that.