I was reading today that it's quite normal to feel stretching sensations & pains that can feel like cramps and/or pulling. As long as it's not strong, and there's no bleeding, you should be alright. But you can always have an OB check you out if you need. And at just over 19 weeks, you'll be having your anatomy scan soon, wont you? (I have mine booked for 19 weeks)
Yes - scan is booked for the 29th. I just didn't remember having it with DD so wasn't sure. No bleeding and not too strong.