Severe left pelvic pain

RaeAnn • 28! Army family! We are TTC for 15 months. Hoping for our rainbow baby ?
I am 8dpo and have had NASTY left pelvic pain for the past 3 days. It started as mild pressure/pulsing then I had some fluttering, now it's just constant pressure :( it's becoming very uncomfortable and irritating! BFN THIS MORNING AND IVE  HAD NO SPOTTING. I've had very tender breasts for about a week now and I'm really exhausted and fatigued.