Learn - I'm sorry you've had to put up with painful bits, it's one of the most wearing and exasperating things to live with.
The dragging sensation, worse when you are standing/walking could be a prolapse. As can painful sex - you've got a bit in the way, and it can be very uncomfortable while it's there.
But, from the way you describe your symptoms, it might be a pelvic floor dysfunction (or, both!).
PFD is too tight a pelvic floor. Think of it like a muscle spasm in your neck after a whiplash. Exquisitely tender, sore if the muscle works or is stretched and can ache for hours. PFs are muscles like any other - and it's not unusual to get trigger points or muscle spasm, particularly if you had tears/episiotomies with birth. Or, if you've had non-childbirth injury, surgery or radiation therapy to your pelvis.
Let someone have a poke about in your bits. Spasm is really easy to diagnose, and responds beautifully to treatment.
And, it's worth mentioning, an orgasm is in part a flickering contraction of your pelvic floor. So, if your pf is strong, so are your orgasms. ANd, if it's tied up in knots it is really, really difficult to achieve orgasm. Sexual function is part of your pf's job, so, it wouldn't be surprising that your sexual response is disrupted at the moment.
Go and see your GP and get a referral. And, DON'T do the exercises - if you do have spasm that'll only make it worse.