Sorness

Yesterday after i got home from work my left calf muscle was so sore i couldn't touch it & it hurt really bad, very vry sore, also my left arm was sore too. I woke up today & now both arms are sore. The sorness in my leg has eased up but my arms are very sore for no reason. Not sure if any of this has to do with standing all day at work or not. But it feels as if i worked out realy hard, but i haven't. Also i'm 14 weeks pregnant. Has anyone else experianced this ?