Painful cramps?

Cara • Expecting our first baby Jan 1st 2016! Married my best friend after 8 years together 10/10/14.
Is it normal to have cramps that are painful? Mine are worse at night. I haven't really experienced any painful cramps until tonight. I'm feeling a very strong pulsating cramps that's been going on consistently for about 10 mins now. I'm 5 weeks 5 days. No blood.