Lingering cramps in inner thighs whenever i sit too long. movement/stretching help n aren't painful. high ddimer in past. should i worry about dvt?

DVT: is always of concern, but in your case the fact that your symptoms are symmetric and transient speaks for a different mechanism, either vascular or neurological through mechanical compression. Would suggest to further self study your condition by using a recliner, if possible at different angles and next to simply place 1 leg on the table and see if and how it' s affecting your symptoms.