I've just gone 35 weeks, and have felt movement from around 20 weeks. Everything I've read says that by now, the baby should have a clear pattern of movement...but mine doesn't! She's very, very active (I had a scan last week, and she was wriggling around so much, the sonographer asked me if I ever got any peace!), but she definitely doesn't have a particular routine.
How much of a set routine or pattern is normal? Is it very time specific, or is it all much more vague than that? How worried do I need to be?