On average, five to seven women in every 10,000 who are using a contraceptive pill will develop a blood clot in 12 months.
I was told by a male junior doctor I had a blood clot on my brain and quickly stabbed with a blood thinner. He apologised with tears in his eyes for not acting sooner. I was a 'classic case', he didn't know how he missed it and said he should have trusted that I knew my body better than he did.