Popping in from second tri - I'm 16 weeks along and have been through this many times. I always get thick discharge when pregnant, and I sometimes get pink or blood mixed in, especially if I have just pooped or had sex or if I'm really stressed out. It has gone away at around 14 weeks with my pregnancies, with three of my four pregnancies (baby #2, baby #3 and current). I also get terrible cramping until around 6 weeks along with my healthy pregnancies. I'm hoping for a sticky baby for you! You sound downright terrified, and I've had that discharge so many times... You're not alone!