The same thing happened to me last week. I am almost 9 weeks pregnant. I think it is fine as long as you havent bled or anything.

I just asked my co-worker who is 8.5 months pregnant and she said it's off and on. So I feel a bit relieved. I've been so paranoid these past few days. I'm so anxious to see the Dr. To find out everything is ok. I keep having these horrible thoughts, I keep worrying about the baby. I just hope everything is ok and everything is going to be fine. I don't want to worry like this anymore. It's too stressful.