Girl I’ve been talking to and hooked up with is now pulling back?

Essentially she replied to my story 3-4. Months ago and we’ve been talking since. We’ve caught up a couple times and hooked up. I’m working out of state but get back in town again soon indefinitely so we haven’t been able to hang as much however we’ve talked on the phone abit. Anyways since we hooked up and then made plans later she’s now starting to pull back. Messaging has turned from 1-5 hr replies to now 2-3 day replies. How should I view this and how should I approach this?

Updates
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Also the plans for phone calls/visits has now turned into (I don’t think I’ll have time, as work has been too hectic)
Girl I’ve been talking to and hooked up with is now pulling back?
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