I feel uneasy and cant sleep at night

Hi mommies. This is my 2nd pregnancy and it's the 2nd night of not being able to sleep on my usual sched. Usually im already asleep by 12mn. But since last night, i have been having feelings of uneasyness and cant sleep :( Time check, it's 3:03 am and im wide awake. Do you also experience this at 4 months of pregnancy? I also feel itchy everywhere.