Anyone else?

LJ • 1 baby girl with another baby on the way
Isla is now 11 weeks old and this like week or so she has been gagging when crying. It's absolutely terrifying! It doesn't happen often just if I'm not quick enough with her bottle she gets so worked up and gags? 
I was thinking it's due to the fact she is teething and has a lot of drool so when she cries she isn't swallowing it then gags? Anyone else have this or experienced it in the past?