Hello Hayley80. I do like pirrip's response to your post as it gives the shortened version of what is needed regarding these issues. However, lest his reply seems inadequate to you, I will attempt to add a little more.
Firstly, You are not alone in experiencing this in the early phases after the operation. The anus continues to want to work as if the operation had never been done and sends neural messages to the brain to that effect. This is also encouraged because there is usually mucus being generated down there which is trying to be expelled. Unlike faeces, it is not so easy for the peristalsis to push the liquid out, so it sometimes builds up inside to cause pressure. Sometimes it solidifies and comes out looking like faeces, which can also be worrisome to people who are not expecting this to happen.
Second: The comment that 'everyone seems to take it in their stride' needs to be placed in the context of the fact that most of the people who reply to these posts have had their stomas for a while and have, by and large, adjusted to these problems and the lifestyle.
Third: The comment that maybe you are just being a baby sounds somewhat self-derogatory. Being new to something like this and trying to make the necessary adjustments is not something to be ashamed of, it is part of the learning process.
What you should know, is that one of the main reasons why there are more experienced people on here trying to help you through this process of adjustment, is that we have been through that experience ourselves and are well aware of how you feel at this time. I hope that when you get to the point that you have mastered all the physical and emotional problems of these early experiences, that you too will be willing to share this with any newbies who come online to share their anxieties in this way.
Best wishes
Bill