First pregnancy... twins... 18 weeks... and I swear all last week I've been feeling movement but now I'm second guessing myself. Everyone describes it as feeling like gas, or bubbles, or water moving... I kinda get the gas description, but for me it's more of a "flick" or a "sharp flutter." It doesn't hurt, but I wish I knew for sure it was them. I still constantly worry about having a MMC and I don't have another appointment until next week. How would you guys describe the very first movements you felt?