hang in there
dont beat yourself up about your past birth experience- you did what was the best thing at the time.

Is it possible that you have pelvic instability and that is causing the problems. Those damm hormones do wierd things to out ligaments. What about finding out about one of those brace things. i think Feeb wore one- so speak to her. I also agree that you can take panadol everyday for the next 8 weeks- what about osteo to help, or physio, or even AP. There are alternatives than taking a pill everyday.
What about swimming? or warm baths? Massage?

If its like period pain- could the pain be brackson hicks giving you grief? If the pain gets worse or unbareable or regular- then go and get your self checked out- my period like pain actually turned out to be contractions

If it doesnt feel right- then it isnt- you dont have to put up with- you just have to find ways to ease it.
Take care and hang in there
odette