Exercise won't help... You need manual therapy, to align your pelvic tilt properly .. For more info. Visit naumika.com

Chiropractic adjustment will help. Core Strengthening Exercises- Straight Leg Raised With Toes Turned Outward, repeat 10 times, twice a day. Back Stretching- lie flat, pull one of the knee forward to chest, hold for 3 seconds, then bring the other knee forward to the chest and again hold for 3 seconds. Then pull both knees towards the chest and hold for 3 seconds. Repeat 10 times each exercise twice a day.

Don't try without Consalt to physio doctor

Meet physiotherapists firstly  then learn exercise for home

Bridge. Lie flat on your back with your legs bent and your feet flat on the floor and hip-width apart, arms by your sides. Push your heels into the floor as you lift your pelvis up off the floor until your upper body and thighs form a straight line. Hold for 2 seconds, lower down slowly, and repeat 8 to 12 times.

First of all u should meet the Physiotherapist and then start exercises under the supervision of the Physiotherapist. Avoid long sitting and take frequent breaks and follow proper posture advice also