yes - it is totally normal. you may also want to check out the Meditation for Serenity 2021-2024! (tips, tricks & discussion/ 3 years running woot!) thread for some night time meditations. Sometimes i have had to go through many different tricks as one night i need more assistance.
a few more ideas that came to mind…
a warm shower / bath before bed
a nice foot massage (the body’s nerve endings are here and it helps calm your body down)
a mindful scan from head to toe while in bed – you start with the toes and squeeze really hard and lightly release with your breath and continue to move up the body till you get to your head.