Any body have period- like cramps a week before af was due?

sarah
I am ttc and I am due for my period on the 20th. I have been have cramps with some bloating. I am hoping to get a bfp next week. I took a first response test on the 13 it was negtive. I though well it might be to early. I have cm that is creamy with a little bit of stickiness. Any answers will help!