Ay sis, that's exciting na! 1cm at 36+5 is actually a good sign na preparing na ang body mo for labor, kaya ang sakit ng singit mo is normal, some of us mums felt that weeks before actual labor pa, lol. Your OB is being safe with the maturity shots and the tocolytics, so just rest muna, do your pelvic floor stretches, at trust the process, basta follow lang what your doctor says and you'll be fine by 37 weeks! Keep us posted, okay?