Aw, I feel you, nakaka-alala talaga pag ganyan! So from what I've gathered from other mums, ang trembling or shaking na yan bago matulog is actually super common sa babies, lalo na pag newborn pa lang. Usually it's just their nervous system adjusting pa lang, especially pag may sudden movements or pag nagulat sila habang tumitigil ang gabi. Most of the time nawawala talaga as they grow, usually by a few months, medyo bumibigay na ang body nila sa routine. That said, if the crying is really intense or if nakikita mo ring may iba pang signs na off (like hirap kumain, overheating, or ang trembling doesn't settle kahit calm na), definitely worth checking with your pediatrician kasi may cases din na pwedeng i-rule out, better safe than sorry, 'di ba? For now, try keeping her calm before sleep, dimmer lights, soft touches, consistent routine. Laging may something that helps, so don't lose hope!