Rectal pain from exercising? sorry for tmi?

Sounds like you have haemorrhoids. And if they aren't treated they will get worse and even more painful (sorry). You need to head off to the doctor or even a female nurse to make you feel a bit more comfortable, and get her to have a look. The good news is that the treatment for haemorrhoids is easy and affordable. But I do think you need a nurse to look at them because the severity needs to be known. Don't worry, haemorrhoids is very common, we all get them at some stage in our life and some are worse than others. But if left untreated, the pain will become utterly unbearable. Good luck :)