Been on estradiol for just under a year now, started at 19. I also got hip pains surprisingly early on, that with chest soreness and very frequent hot flashes.
The hip pain definitely goes from mildly irritating to really fuckin noticable, but that's also cause I'm particularly sensitive to sensory shit.
So hip pains as far as my uneducated opinion goes are totally normal, as long as it's not like excruciating pain.
You're doing great hon, the first 6 months are definitely a wild ride <3