Hi!
If you were my patient, I would offer you a blood pregnancy test. I suspect however that the irregular bleeding and the other symptoms are caused by your birth control. It is very common to have irregular bleeding with Micronor. In fact, that is one of the biggest complaints of people who use that pill. It is also not quite as effective as pills that have an estrogen component. It is less likely to cause blood clots or nausea though.
If it bugs you to have irregular bleeding, you may have to consider a switch to a different brand. If you are good about taking your pills and the irregular bleeding doesn't bother you, you could stick with Micronor.
Good luck!
Dr B
I have also been very tired lately also.