Run.

From Reddit Choose Your Own Adventure

You are scared of the way she looks so you sprint down the stairs to the dirt road. You look back and realize she is following you. You are terrified now and run into the forest, getting cuts from the branches around you. She yells out saying, "Why are you running away and why don't you remember me? I won't hurt you." As you keep on sprinting you only hear your footsteps so you turn around and she isn't there. You think you have lost her and turn back around on the trail. When you turn, you scream in horror when you see her right in front of you. You're too terrified to move. She looks at you and asks if your arm is bleeding. When you scaredly say yes, her face turns to an excited grin and starts to expand; mainly her mouth gets bigger. Then she grabs you and before you notice what's happened, she's gobbled you whole. In her stomach you find a gun what do you do.

Shoot through her until you can get out

Find her uvula and have her throw you up

Think that her stomach acid is quite warm and cozy, and decide to stay