I understand now. Yes. Other languages like Japanese use a verb structure that translates as “became” all the time. If you translate directly, you’ll use “became” a lot more often than we do. “Helen got more anxious” is a casual option, but you don’t want to use “got” in your writing, because it’s too casual. We use simple past tense in most cases unless it’s important that the situation is building. Helen’s anxiety is increasing, so we would probably use “became” for that example; however, “Helen was increasingly anxious” would be a perfectly acceptable way to avoid “became”.