Contractions at 30 weeks

Alysa • Robert Jr's Wifey 💚 I love & live for my BOYS *Roberto III & Roland Alexander💚 BABY GONZALEZ #3 Due June 2018
I feel like this is a silly question for this being my second pregnancy but, what does Braxton hick contractions feel like or whatever I didn't have any contractions at all with my first born 9 years ago. I've been getting sharp lower stomach pains to where I can barely sleep at night they come and they go. Thanks for any answers and advice in advance !!