Hi all I'm freaking out a bit(as I do)I'm 18weeks pregnant. Been suffering with awful lower back pain, I literally cant walk! Seen a physio who used a TENS machine on me and it helped. He advised to get one for myself but that's when the panic has set in as I seem to keep reading that theyre not for use until 37+ weeks pregnant. I've looked online as to whether the use of TENS is safe before then and find conflicting info as per. Now I'm scared I've harmed baby or going to cause miscarriage:( please help, I'm hoping for reassurance, has anyone else used TENS in pregnancy itself, not labour and all been ok? Thanks x