Worries sick. Migraines and the mini pill

Hello ladies I need your assistance, I recently start birth control, after a discussion with my doctor about weight gain and migraines while on the combined pill and also when I started depot, we decided that the progesterone only pill would be best.

However I'm still getting migraines with it, today I went to refill my prescription with my gp and nurse but they wouldn't give it to me. The nurse took my blood pressure and check my weight but told me my prescription wouldn't be ready until she had discussed it with my doctor.

Has any one else experience this or been through a similar thing. I'm worried because I've only got six days left before I run out. My partner and I would like children but were are saving first.

I'm just confused, what might be the problem here??!!