Hi, so earlier about 2 hours ago I was walking around town with my sister and I felt a popping sensation down below and suddenly REALLY needed to wee, but I had only just gone! Ever since then I have had cramps, back pain and rib pain and just felt uncomfortable. I keep needing to wee as well :/ I have a headache now and feel really hot so laying here at home next to a fan. I'm only 27 weeks, any idea what it could be? :/