I feel you girl I'm trying to do labor on my own and nothing is working for me I'm about 1cm thick, they saw sex but I have no urge or energy on having sex with my husband everything is irritated me
Yes it's too early, and no there's nothing you can do since the baby decides when it's ready to come.
you may want to wait until after 37 weeks so the baby is no longer considered pre-term. but walking, stairs, bouncing on those big balls, sex with ejaculation softens the cervix, masturbation with an orgasm causes contractions, nipple stimulation, they say spicy foods.
I would avoid the drinking different stuff, doesn't always work and some teas aren't safe. and not yo use castor oil, as it will give you diarrhea and can cause the baby to also have diarrhea resulting in the likelihood of an infection from the baby swallowing meconium.