If you are not perimenopausal or fully menopausal, so under....44?...mebbe?...give or take whatever the typical variance is in the female population in general, and you have irregular periods, this suggests a possible hormone/endocrine issue and it might be worth checking it out with your physician.
I'm not diagnosing, just giving examples of what it might be, and of things that bear some investigation and correction if it is warranted...again, see your PCP for that. Cushing's Disease and Grave's Disease. My aim here is to help you to accept that there are known conditions, disorders, diseases, that can be well-managed or even eliminated, and they have names, and that your care providers would probably welcome a chance to put you right.