I had a postpartum DVT develop two weeks after birth last time. It got quite bad before it was diagnosed as it was in an unusual place in my thigh and presented in an unusual way. I took oral blood thinners and it got better, although I still get the odd twinge in that leg (and weirdly it's one of my PMS "tells" for my period!)
I didn't have any risk factors and I am of the opinion that I basically just got unlucky. I'm not madly keen on the idea of prophylactic blood thinners as I understand it can increase risk of haemorrhage in labour (which I borderline had in my first pregnancy).
I'm only nine weeks but am seeing the consultant on Wednesday and I'd like to know what the usual pathway is and therefore what she might suggest.