In my younger years, in the USA, they call you in once a year, so it very soon became no big deal to me. In the setting of the clinic, with a sympathetic female performing the test, I never felt at all invaded -- my mind just switched to "This is a medical professional doing a routine thing that ensures my continued health." You get a mindset that doesn't make it "personal" or invasive at all. At least, I did. I can't speak for everyone but my personal experience is that it's fine, it's a breeze. (Literally, it's a bit drafty, hahaha!)
Relax and breathe deeply and regularly. Think of peaceful things and unclench everything "down there." The speculum is often cold even though they say they try to warm it up, so that's a bit of a shock, but it's really not painful.
All the above is only MY experience, which was unfailingly a comfortable and good one. I understand that other women may feel the total opposite.
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