38weeks - FTM, for the last 2 days when I stand, walk or sit up straight for too long I have been getting a sharp, persistent almost tearing sort of pain in the same spot to the left of my belly button. It feels like baby's got a part just constantly pushing there but when I rub it or touch the spot there is no solid body part. I've rubbed it the wrong way a few times where the sting gets really bad! It goes away when I lean/lie back but I don't want to lie back too far in case it's cutting off circulation to the baby. I'm only stressing because last week the OB also said I was measuring big (jumped 3cm in a week) and is sending me for an ultrasound next Friday. This could all be SO normal I would just like to know if anyone else is experiencing / has experienced this! 
Baby and I thank you for any info you can shoot my way!                 
                             
        
Re: Persistent "Sting" on belly