Hi mummy! I had brownish discharge thrice during my pregnancy, once was at 5 weeks, another at 16 weeks during Christmas and another time was early this year. Each time I went to see my gynae, baby was doing well but for me it was due to some kinda bacterial infection. If it gives you a peace of mind, do check with your gynae and have an assurance scan although most of the time it's a common occurrence! And yes, it's normal for some mummies that they don't experience much symptoms, my morning sickness only started from week 6 onwards till end of 1st tri.