Hi welcome to Health care magic forum.
Thanks for choosing H.C.M.F.
You have got irregular periods
, had unprotected sex in expected date of ovulation. Feeling pain in the suprapubic region. difficulty in passing urine.
As you suspect it could be threatened abortion
, or tubal pregnancy
. Urine pregnancy test reveals if pregnancy is there.
As it appears it must be a urinary tract infection
. or stone in the urinary tract
I advise you to consult a gynaecologist for diagnosis and treatment. You may need to have M.R.I. besides other routine tests for confirmation.In The mean while you can have anti spasmodics for pain relief.
Wishing for a quick and complete recovery .