Pressure in pelvic area when pooing - 39 weeks pregnant

TMI I know.

I am 39 weeks and been having tightenings and cramps for well over a week now, there has been times I've though labour was starting but the pains slowly disappear.

I've noticed the last few days, I've been needing the urge to go to the loo for both poo but once I get there I don't need anything. I am not constipated as I am going to the loo and my stools are alot looser then normal when I actually do go.

When I am going to the loo though I get awful pressure in my pelvic area. I know baby is super low down as my midwife told me but it rwally hurts even when I'm not pushing.

I was wondering is this normal at this late stage? Could this be labour progressing or is baby jisy sitting so low its making it super uncomfortable.

Any comments or help would be appricated