Mw has called and advised I need to go on iron tablets after my blood tests taken at 28 weeks. She has left a message with gp to create prescription. I've never been on iron tablets before, should I ask for a specific type or would I be better with something you can buy over the counter? Should I ask for something at same time to help with or prevent constipation? Things are already a little slow in that dept. Any tips much appreciated.