Go to the doctor, questions like this is very hard to say what it is. 20weeks is very early and a very risky time so sharp pains like that you don't need anyone to try to diagnosis your symptoms other than a doctor. Skip Google and go find out yourself. God bless .
I would call your doctor it might be a uti.
Go to the doctors asap!!!!
Go see your doctor asap , its not normal to have severe pains, don't wait but go to doctor
What do the cramps feel like? Is it shooting down your leg? Is it in your back or just the front?