Have you every been assessed for pelvic floor dysfunction. This is when the tissues of the pelvis are relaxed and allow the bladder and or rectum to fall into the vaginal vault. An anterior wall prolapse of the bladder could certain cause many of your symptoms. You can check for it yourself by inserting your finger into you vagina and bearing down. Best done while standing. If you feel a large bulge you may have a what is called a cystocele. You can consult a urogynocologist which can help. I would suggest seeing a urogyn specialist either way for some assistance.
If you have culture proven cystitis (UTI), and these are recurrent, there should be a hunt for the cause: Causes can include kidney/bladder stones, collecting system anomalies (These 2 can often be found on a CT Urogram or Intravenous pylegram), urinary retention (can be found by checking a postvoid residual). A Fistula (abnormal connection between bladder and vagina or bowels) can also cause the problem you describe. If you have had multiple surgeries in the pelvis, you may be at higher risk for some of the above conditions. Your symptoms of needing to push to urinate and going often during the day make me wonder about incomplete bladder emptying...
High vaginal ph usually goes along with low estrogen levels, or perhaps urine collecting in the vagina.
this could be an allergic reaction to condoms if u use them...or if u use KY...i had the same problem and then i stopped using condoms and the UTI's went away.....if ur not using condoms or KY it could be from tampons or not urinating or cleaning yourself after sex...if this still doesnt work then u mite need to go and see a doctor...they can prescribe your something to get rid of pain and UTI