Do you have private health insurance? If so, probablythe best thing is to set up a contact with a private gyne.
If not, sort out your E111 (think it might be called something else now but NHS info should be able to help you). Then you will be able to see your corresponding local GP (or midwife) if it's just blood pressure etc you want checking or if you have any bigger doubts or questions, see a gyne via outpatients (urgencias). You will find you are very well looked after, albeit slightly more medical than in the UK.
Do your homework, though. Have your papers in order. Also, if you're going to a typical resort type place, there may well be some sort of English webpage, forum or similar that will help you out.