Hi there. Yes, there are other things in the gynecological area that can cause a very long cycle which is what a super late period is. They may check your hormone levels and your thyroid. I had periods every 3 to 4 months due to a slow thyroid. This is not uncommon. So, you've ruled out pregnancy and now it is time to figure out what is going on to cause you to have such a long cycle. Work with your doctor on this. good luck