Talk to me about Group B Strep. I'm 35 weeks and I've been hearing about this and that the NHS don't routroutinely test for it but that you can get a private test for about £35. Has anyone got experience of this, is it worth getting a private test done? Spoke to midwife about it but she just said it's up to me to decide and that one week I could test positive for it and then the next week could get tested again and be negative.