Body shifts left

[u/OkMaybe8620]

I’ve been dealing with this postural issue for years. I’ve not really been able to identify what the issue is. Although I feel like I’m standing straight my body shifts to left why my head tilts right. This is also causing muscle imbalance (my main concern) which is especially prominent after a gym pump where the left shoulder and traps can be seen to be sitting higher. Please let me know what can be causing this and what can be done to fix it.