TMI- vagina question

I'm 38 weeks today. For about the past week my vagina has felt SO swollen, which I know is common. I've been putting ice packs down there to help with the annoyance, the sweating and the pain. Friday however, when I was having a bath, my husband noticed that my vagina has turned purplish/brown in colour and is most definitely swollen. I'm just wondering if this is normal, if I should talk to my midwife about it, or what. Does this mean labor is near or is it just a lot of pressure?