Could it be dvt, worried about it so much?

Ok so I had my beautiful baby boy 6 weeks ago, a week and a half later I started to get leg ache/niggles in my right thigh and behind the knee, I've been to the doctors 3 times and they've all said it's probably muscular as my leg hasn't swollen, then I started to feel generally unwell, went emergency doc and she put it down to a urine infection. Now I've started to get the feeling of blood rushing through my thigh n I feel generally unwell, leg isn't swollen but the aches and blood rushing feeling is still there, I feel in myself that somethings not right but the doctors won't do any checks, does this sound like dvt? Thanks