Probably some Braxton Hicks. The real contractions are very frequent and comes in a sequence... You can't talk through them or even move depending on how well you tolerate pain. The thick yellowish discharge is something new. It may be your mucus plug but I'm not sure. Maybe you should google that or ask your Dr hun.
My stomach hardened all the time.. it feel like she's balling up.
It's normal to feel pressure down there as you get closer. I started around 34 weeks feeling a lot more pressure. I'm 36 weeks now. I honestly thought I was going to have my little guy early the way I felt. I still think I will but I could be wrong and go over lol.
Contractions feel like your whole stomach hardens. Sometimes there's back pain, sometimes there isn't. You can start off not having pain, as the contractions get stronger they hurt.