I've had this fear. I once slipped on my steps, caught my calf on the edge of a stair, and had a bruise that lasted for months. I was absolutely convinced I had a clot, despite not having any other symptoms. For a year or better, I was convinced that my calf had a clot every time my calf ache (I think the fall caused some scar tissue on my calf muscle). For those of us with HA, once our minds focus on something it's impossible to shake. Even now, I (sort of) jokingly refer to any calf pain as "my blood clot". That being said, my nurse grandmother and my PCP explained that, when a DVT presents symptoms, they tend to be pretty hard to ignore. Swelling, hot skin, discoloration, etc. Achy legs, especially if it's both legs, are not it.