Just a rant on things playing over in my head

I'd a fall out with a good friend yesterday who seems to think I 'blame' her on things I'm genuinely not 😕 it is so beyond confusing and my head is in a pickles. For example we had an argument a while back and I got so stressed (of course with being pregnant) and I threw up because my body overreacted to the stress a lot. I text her to tell her I was done arguing as it made me sick. And suddenly she thought I'm blaming 'her' on making me sick. Which isn't the case at all. It's the arguing and what it's doing to me I don't think it would necessarily matter who the argument was with.... Again the other night I asked her to collect something for me because she was going there anyway so it wasn't out of her way at all. She had to collect something too. And because I made a comment on the person she went to see and how daft I think they are (reasons I won't get into online lol) she suddenly thinks I'm aiming it at her somehow and calling her a thief 😕😕 I wasn't even thinking of her. But I guess as always I'm out to get her I don't know. Then she told me stuff revolving my baby's dad which give me serious contractions as my body went under so much stress hearing about him etc and because I said I couldn't hear this and don't tell me about him again please I feel like I'm ready for labor with the stress suddenly I'm blaming her 😕 it would be the same outcome if anyone told me it. During an intense argument I got so worked up and angry I snapped at my son when he spoke to me. I said to her I have to go this is stressing me out and I've just took it out on my son here it's not fair. Again I'm blaming her that it's 'her' fault I snapped at my son. When again it wouldn't matter WHO I'm arguing with the point I'm making is, these arguments aren't good for me and are making me sick, and making me snap at people. I could be arguing with Jimmy down the street and it isn't going to make a difference it's the principle. So why does she take it that I'm always so out to get her. And blame her. This confuses me so much. It always just seems like woes her someway or another. I couldn't stop thinking about this and how confusing it is so I needed to kind of just rant it out somewhere 😕 sorry folks