FWIW, I don't think there is a wrong choice you can make as far as the T is concerned. Would it make you feel better to contact her and apologise, or would you feel that you were bugging her more? (I'm not saying you have been bugging her. She did tell you she was fine with your frequent texts before, remember.)

Please try not to read too much into T's choice of words in her texts. It is so easy to interpret emails and text messages the worst possible way, when there are much less negative, and equally likely interpretations. Talk to her about it when you see her.