She texts me on the 3rd day and says "Hey! I'm sorry, I haven't been feeling really good lately" (she didn't word it like that, but I guess that's pretty much what it meant). Then, she says that she hopes I'm feeling good and she asks me what I thought of the latest episode of the tv show that we both watch. She texted this very early in the morning, so I replied like 3 hours later (when I woke up). She still hasn't replied. But, we text on a website that doesn't send push notifications, so that might explain why she hasn't replied yet. But I don't want to check if she has read it (or else she'll see that I was active not long ago and probably believe that I'm obsessing over if she has read it or not). Saying this because she knows that I pretty much only chat with her on that website. I just don't understand, she literally apologized this morning for being inactive and now she's back at it again.
Anyway, now, my question is (please vote in the poll): should I stop texting her first and not double text as well (even if she might actually not be feeling all that good at the moment)? And should I ask her if she wishes to keep contact with me (could explain that I'm feeling a distance in the friendship)?