Has Anybody had this type of pain before??

[LisaC]

Since about 17 or 18 weeks, i've been getting this really excruciating pain on my right ribs... the pain has been increasing, at first I would get it late afternoon, and after going to bed with the pain, by morning it would be gone, now it seems to stay with me for most of the day... Does anybody know what this pain could be? The only relief I get is by applying a bit of heat and having a lie down.. Some people have told me that its the baby pushing up into my ribs, but I dont think its that.. Any help would be appreciated... thanks