Low back pain, insomnia, spotting?

Hi everyone! I have been dealing with a weird set of symptoms for the past few years and have been working with my doctor. As of my most recent labs and one ultrasound, we have ruled out pcos, ovarian cysts, and fibroids, but my doctor said it could still be endometriosis.

I am dealing with:
-low back pain throughout the cycle but worst the week after my period. It radiates from my tailbone and my back just feels so stiff
-insomnia (waking up at 4am and not being able to go back to sleep) always with the back pain
-spotting pretty much from ovulation until my period, also always with the low back pain
-my period is painful but not excruciating and can be heavy, and it also stops and starts a lot

Since I started experiencing these symptoms I just haven’t felt like myself. Low energy, low sex drive, and mood swings/irritability.

I realize these are not typical endometriosis symptoms, so I’m wondering if and how I should push for more screening for this, or something else. I’m really sick of living with these symptoms!

Thank you ❤️ and apologies if this is not the right forum for this.