Unusual period

My period, for the past couple of months, has been... strange. Last month I bleed for 10 days and exactly 2 weeks after I stopped bleeding I started spotting again. The month before last I spotted for about a week before my period as well.

I'm not sure what to make of this and it's a bit concerning as I'm 33. My mind immediately jumped to early menopause. I have PCOS, hashimotos disease, insulin resistance etc.

Has anyone had this happen to them? What was the cause?