LDR gone cold?

I'm in a ldr with a girl and its been about 7 weeks, so its new. But this past week she's gone cold on me. We still talk a lot but she's stopped flirting with me and stopped wanting to sext etc. Maybe I'm just over thinking things but its so different to how she has been.

She's told me she's not great at giving and getting affection so I'm not sure if she's just having a moment and I should just wait and see. I've tried asking her and she said there's nothing wrong.

Do you think she's gone off me or that there may be a bit more to it? We both had a chat about being honest with each other a couple weeks ago because I know communication is key with ldr.

Any reassurance or honesty would be super appreciated.