TWO periods in one month?!!!!

Colee

So my husband and I have been TTC for 6 months now and my cycle is usually every 29-34 days. Since we have started TTC the past two cycles have become shorter. I had spotting mid cycle last month and thought it was just ovulation spotting and just went on about my business. Period showed up when it was supposed to about two weeks ago and was lighter than normal. So anyways this past Friday I had cramping and thought okay I’m about to ovulate again since it’s almost my fertile window...then Friday night I get severe cramps followed by a downpour of dark clotty blood! I’m still bleeding very heavily and it’s still clotting bad..I took an ovulation test too before I started bleeding and it was negative so my question is has anyone else experienced this?!!! It’s like every since we started trying my body is out of whack 😩 I also have had SI joint issues every since TTC so I’m not sure if that’s linked to whatever is happening with my body so any info is helpful! Thanks!