In a supersized look at what's to come this season, Chelsea reveals that she thought she knew what an anxiety attack was, while her longtime friend Chelsey tells Chelsea's father Randy about an upsetting incident she recently witnessed.
"Her lips were just quivering and she was like, 'Let's go to the emergency room,'" Chelsey reveals in the clip above.
Chelsea's take on what transpired: "I swear to God, I thought I was dying."
What other life changes and developments are Briana, Jenelle, Kailyn and Leah facing? Who admits that she has broken up with a significant other -- and which Teen Mom OG makes an appearance? View the video, and be sure to keep watching Teen Mom 2 every Monday at 9/8c.