The finger pricks are no bother to me as I'm a diabetic, but I don't think I could do my own throat swab, as I gag horribly! I was slightly concerned when I went to Preston GUM (in civvy mode) for a regular screen recently and the nurse said they didn't routinely do throat swabs on heterosexual women as they considered the risk to be very low.
I agree that it's best to go to a clinic once or twice a year (even though many you swab your own vagina now, so nobody gives you a check). Even better go to a sex worker friendly one and make it known you're an escort.