Increase body temperature and Tailbone pain

[YellowRuffle]

Pls does anyone experience increase in body temperature from day 9, my tailbone pain me down to my left leg / hips sometimes, with tummy discomfort after embryo transfer? Can a home urine test also give false Negative 12 days after blastocyst embryo transfer?

Also I prone to OHSS so my clinic went for short protocol. Any one with these similar experiences to share pls?