Am I doing the right thing?

Yesterday I noticed my girl was being different. I usually get a good morning text or I send one to her depending on whose up first. The previous night we texted well and she was sharing some childhood nostalgia to which I listened to, she abruptly said she had to go to sleep so I called to say goodnight and it didn’t seem like she wanted to talk much so I let her go. That next day I heard nothing from her until I texted her around 5pm and I asked what was wrong and she said “it’s not you, don’t freak out, it’s just one of those days” and remained quiet with her texts so I backed off and gave her space, today it’s the same situation. Am I doing the right thing with giving her space? I don’t want to seem pushy but I’ve also offered my support already which she kinda brushed off. If the roles were reversed I woulda been in so much trouble for acting that way too. Any advice?