<human>: Can you succinctly summarize the text in 1-3 sentences?

My girlfriend and I have constantly been texting the last four months. If we hung out, we'd text each other after we got home to let each other know we're safe. If we're busy, we'd text each other even if it was 4 hours later. We remain in constant contact or at least we make an effort to. She has let me know up front that she is a shitty texter but the last 4 months, she hasn't really been that way.

Recently (last 2 weeks), she has told me that she has been studying and catching up for classes a lot. This means that we haven't had time to hang out or do much together. I went to her game (she invited us the first few times and my friends and I have made it a tradition to go to her games) and that was the most I saw her in a week. 

Also our conversations have been ending without a response sometimes. Like I said, she usually makes an effort to respond so I am slightly concerned/confused. 

Today, I saw her before and after our test for class and we talked and I asked her how she is doing. She talked to me about how she's doing okay and some other stuff about her family life. She was pretty affectionate and we still kissed before she left. We have plans this Thursday for lunch after another test.
<bot>: How can I go about asking her about the sudden change in her texting habits? Should I wait until exams are over and see if her habits go back to normal?