Hello Amanda. I can understand that. I've been posting on line for years.Between this forum, it's predecessor and another forum that I moderate, I've read about 50,000 posts and believe me you are not the only person who worries about saying or posting something wrong. A lot of people quit posting as they are afraid that their posts will be taken wrong.
I've also posted about 10,000 replies and I still get the extreme jitters some nights and I'll erase a reply 10 times before I post it and then I'll worry all night about how that post was received etc.
Of course when I look back, I usually see that the post was just fine, but at the moment it can bring me a lot of stress for no known reason. Actually there is a reason, I have a variety of problems with anxieties, plus additional problems with bipolar. So you are not alone in your worries about this.
In my case and probably a lot of other people's cases, perhaps even yours, I can also feel that people in general don't like me.
What helps me the most is that I try to spend at least a part of each day telling myself that I'm a good person(not hrs, but a couple of minutes) . I have bad moments, I've even had bad yrs due to my illness, but that doesn't change the fact that I'm still a good person. People like to be around other good people who share common interests. I just have to make myself realize that. My personality is such that I'm never going to be elected the most popular guy, but there are still enough people in the world that I can be friendly with.
Having said that a couple of other things help to keep me on the sane side. First, when I start to think that everyone hates me, my wife is liable to tell me that I'm not important enough for everyone to hate and that most people don't even think about me, much less dislike me LOL . Second, most of my friends these days have a mental illness. Some of them are extremely functional stage of their illness and some not so much, but they all understand what mental health issues are all about and that really counts for a lot to me.
Anyways, I've rambled along enough for today, I hope that you post more. Take Care. paul m