I have a pain in my thigh when walking after 7 weeks after total hip replacement surgery

Go to your Doctor or specialist may need some X-rays,

You've been in pain for a while. It hurts to walk, sit down and get out of a chair, and even to simply lean over. In fact, your hip even hurtswhen you're just sitting or lying down. So you've decided to move forward with hip replacement surgery.
One reason people are hesitant to move forward with this surgery, as with most surgeries, is not knowing what to expect after you wake up from surgery.

To quell your worries, here's a breakdown of what you can expect to happen after your hip replacement surgery.
1) Recovery begins immediately
As soon as your surgeon completes the surgery, your recovery begins by walking the same day as surgery.

2) Physical therapy is your new hip's best friend

3) Getting active

the doctor should have you on warfarin or other blood thinners
This is a serious condition and you should be asking your doctor for pain medication

not for this forum.

For an kind of joint pain you should consult with an orthopedic doctor. The hip joint can withstand repeated motion and a fair amount of wear and tear.

As a home remedy, RICE technique for Hip Pain Relief

You need to seek medical attention. Sharp pain in this area is nothing to ignore.

notify your doctor over your concerns

The main cause for so-called shin splints that I've assessed in working with runners for nearly 9 years is hip weakness. The hips and glutes in particular are meant to help push off the ground with each stride.
When you have weak glutes you can't effectively push off the ground from the hips and other muscles have to pick up the slack. Because these muscles aren't meant to do the work they are doing they end up over working which results in pain.
Some of these muscles include the hamstrings (back of your thighs), quadriceps (front of your thighs), calves, plantar muscles underneath the foot (plantar fasciatis) and the tibialis anterior.

If you facing Hip pain then you need to consult an Orthopedic doctor who can help you in elbow pain.