Since your doctor suspects fibroids and has referred you for an ultrasound, it’s best to continue taking your Utrogestan (progesterone) as prescribed until you have more clarity on what’s going on. Stopping it to induce a bleed might not be the best approach, as it could lead to unpredictable bleeding or worsen symptoms, especially if fibroids are involved.
The cramps could be due to hormonal fluctuations, uterine lining changes, or fibroids themselves, and stopping progesterone might not necessarily help. Since you’re managing the cramps with painkillers, it might be best to stay on your current regimen until you have your ultrasound results and can discuss next steps with your doctor.
However, if the cramps become unmanageable or you feel strongly about trying a short break from Utrogestan, it would be wise to check in with your doctor first.