I'm 25 weeks pregnant and today i started having incredibly unbelievable pain in my lower abdomin and lower back. they felt like mentsrual cramps. i didn't know what it could be or what i should do. they would be really really bad for about a min or less, lighten up for about 5 minutes, and then start hurting again for a min or less again. i have had a little more discharge than normal. what should i do? what could it be? please help me!