Abdominal pain

Shanika • I am a mother to one daughter and is expecting my 2nd daughter 👶🏽11/28/16👶🏽
So I have been having some weird lower stomach pain I dnt know if it's from my stomach stretching or what but it's at the bottom and sometimes it hurts and scares me anyone else have this I have a doctors appointment Friday I can't wait to get there my stomach sometimes feel really heavy at the bottom also and I'm 16 weeks today at 6/21/16