Swollen part in thigh. Decrease?

I traveled in car for a long time yesterday wearing jeans. After waking up after a Nap I had leg pain especially in knee and felt my legs are heavy. The pain reduced after placing them in an elevated position but came back ( only one leg) and particularly thigh started paining and a small part on my thigh started swelling and became warm and numb. I couldn't sleep at night as pain increased ( I had kept my leg on a pillow) and found out that the swollen part showed small red nerves ( like spider veins) . I was in my pyjamas but it was a little tight at my thigh so I wore loose pants and massaged the part the pain reduced completely . So I suspect it to be because of tight pants. Now the swelling has also decreased and veins are not seen but when I press and touch firmly I can feel a swollen part. Should I walk more or keep my legs elevated , should I be not worried bcuz the pain and swelling has decreased. Could it be DVT should I see a doctor evn if symptoms decrease? Please do help🙏