Hmmm, how frustrating for you!! TBH, it sounds a lot like my last AF. I thought I was UTD as it was so random and different. I had a weird period in the end but I ended up doing two HPTs just to be sure and both were negative. I think it may have just been my cycle doing something new.

I hope you're UTD hon and will cross my fingers for you but it does sound a lot like what I just experienced