I have same problem but mine is on right side I'm left handed I don't know if that's why but this is seventh pregnancy I've lost 4 high risk.I've never had this it was so bad earlier it took one hour to get in car my neighbors had to take my husband to work. My three girls are so worried Tylenol don't work and that's what my ob gave. its a spasm and that don't help! and I'm 17 weeks what to do? I have a awhile and can't do this.I tried to exercise but the longer I stand worse it gets I'm tired of crying