Pulling pain in lower abdomen???

Hello! I'm 11 weeks exactly now... So far not much troublesome symptoms except for mildly sore breasts and bloating. But since last night I've been experiencing this pulling pain... I can't say that they're cramps because it's as if a single muscle is being pulled down.. It lasts for a couple of seconds and vanishes. It comes suddenly when I get up from my seat, or make any sudden movements... Is this normal??? Any of you experiencing these pulling sensations??? Please help and advice! Thank you!