Should I text her again after a one-word reply?

A single word doesn't tell you much on its own. The pattern does. Scroll back through the last several messages and look at how she usually replies. If her messages have been short from the start, one word is just her style and not a sign of anything new. If she was writing paragraphs and suddenly went to one word, that's a real change. Maybe something's going on, she got pulled away, or she lost interest.

Also check what you sent right before. If your last message was a question, a one-word answer might just mean she answered it and didn't have more to add. If your last message was a statement or a joke that didn't invite a response, the one word may be her politely closing the loop. Neither of these is a rejection, but both mean the ball is less clearly in her court.

The next message should open a new thread she can actually pick up. Something specific works better than something general. A question about a place she mentioned, a link to something related to a topic she brought up earlier, or a plan with a real option attached gives her something to react to without having to write a paragraph.

Keep it light and forward-looking. Don't bring up the silence or the one-word reply. Don't ask her to explain herself. The message should read like you're still interested in the conversation, not checking on the status of the match. If you catch yourself wanting to add a line about not being sure where things stand, cut it. That line puts pressure on her and rarely gets a better answer.

Give her enough time to have a normal day. For most people that's somewhere between a few hours and a day, depending on how active the conversation was. If she was replying within minutes before and now it's been hours, one follow-up later in the day or the next morning is fair. Send it once.

If she replies, even briefly, match her energy and see where it goes. If she doesn't, leave it. Don't send a second message asking if she saw the first one, and don't send a "guess you're busy" line. Silence after one good follow-up is an answer, and the most useful thing you can do is stop and let it rest. You can come back later if something new comes up, but a pile of unanswered texts makes the decision for her, and it rarely goes in your favor.