Do you think she is lying to me?

[485]

Look we talk everyday and have massive convos and shit.

Yesterday I talked as normal and she didn't reply until about 12 hours later which is never eve like her. She then said in that reply message "sorry I haven't checked my messages today"

But meanwhile I was browsing through instagram earlier that day and there she popped up... found she uploaded a few photos and posted a many stories to .

So she has time to do that but not check her messages? How do I confront this because I don't tolerate being lied to
I didn't stalk her activity or wait by the phone, I came across them and almost jumped to the conclusion