I am not a giant fan of texting professionals. I called or emailed. Texting, to me, is easier to erase, not see, forget about etc. I would call or email and wait. This a pretty busy time all around and all sorts of goofy stuff is happening (if even a small percentage of student excuses are true). Not following up doesn't hurt her but seems to be bother you SK - and you have the key to stop it. Contact her a different way before jumping to conclusions and thinking the worst.