Could this be the baby I'm feeling??

No rude comments please!!!! I'm 12weeks pregnant with my 2nd child. My daughter is 4 so I'm having a hard time remembering everything. I know they say you can't feel the baby move this early & they say it's probably gas I'm feeling, but I really don't think it's gas. I understand at 12weeks the baby is only the size of a lime, but about once or twice a day I feel something (or at least I think I do) could this be the baby I'm feeling?? We are really excited about our little one && very anxious to meet him or her. Could this be why I'm feeling this way it could it really be the baby?? Everyone's body is different is anyone else feeling this way??