Rectal Pain and Pressure: Causes, Relief & When to See a Doctor

Question
I got married in march 2013 and experienced uti for several months. I was also on contraceptive pill named MELIANE for few months but with gaps between months.even though I completed antibiotic courses but had somewhat of pain and burning during urination.so i had ultrasound abdomen.it was normal n dr asked me only to drink lots of water.nothing more.but from few months I am experiencing rectal pressure/pain esp during periods.the pain is sudden and last for few seconds but is extremely intense that jumps inwards.please note that I was on pills this june and july(2014) consecutively. when I googled abt rectal pressure and found that this can cause infertility , im a bit afraid and stopped using birth control pills.but luckily last week I had periods,and surprisingly there was no had no re0ctal pressure.this was a wow factor for my so much concern. note that I and my husband have planned to have a baby after 5 to 6 years since he is going abroad and wont be able to come in less than 6 yrs. and im already a patient of scoliosis so I think low back pain of mine maybe due to the spinal curve and not this rectal pressure. can it be due to gases?but im not sure whether I have gases prob or not.but I do discharge gas very often.
all im concerned is about pregnancy. please let me know whether there is any chance of being infertile :( this is so horrifying for me :'( and this month's [periods were rectal pain free so does that means I have no such threats of being infertile?

Answer
For the most part, I don't think there is any relationship between rectal pressure and fertility.
That said, there is a condition called endometriosis that is associated with infertility, and also can cause painful periods and pain in the rectal area during periods.  The problem is that one needs surgery (laparoscopy, scope through the abdomen) to diagnose endometriosis.
There is never any way to really know if a woman is fertile until she gets pregnant.  Most young women are fertile.  All women become less fertile after the age of 30 or so.
Most likely you will get pregnant when you wish (depending on how old you are), but until you try, you won't know.  I hope that is somewhat helpful, although it may not be.  Best wishes.