Anybody with blood clot knowledge?

hi there... Ive for months have had on and off calf pain. Ive had tests to rule out dvt... and I excepted and moved on. but since being off work for the holidays, the last couple of weeks laying around the house, my left upper thigh feels like its on fire! only when I move though. which makes me think its just a pulled muscle but.... with my health anxiety, I think the worst. just need help analyzing. so finally, my question is... can a dvt start in the upper thigh??

Anything is possible but typically they start in the calf. I would do so stretching and see if that helps.