Is the normal?

Im 20 weeks and for the past 2-3 weeks i literary can not sleep. I cant fall asleep until like 3AM and i wind up waking up at 8 AM . And i cant fall back asleep. I have been having such a hard time trying to sleep

Also, i have been having like a weird cramping in my middle lower abdominal a little more over to the right side than the left . And its been happening for about 3 days now and i have been drinking water . Its so hard to explain the feeling , its not serve . But its like cramping and sorta a tightening feeling ?

This is my first and im worried , has either of these happened to you?