Bowel Movements, 37 wks (tmi)

So this is definitly tmi but I would like some advise! My whole pregnancy I have had very regular BMs (almost to the hour actually!). The past 3 weeks I have had really loose stools or diarrhea. Now for about a week I have had... I don't know who else to say it but... constipated diarrhea. Every 3 days I finally am able to have a BM and after alittle work it is all diarrhea. Is this normal? I sure don't like it. What can I do to help make it alittle more regular?