Is it normal to behave weird just after the breakup?

Maybe_1day
So she broke up with me Last Sunday, and not even a week passed, she started sharing happy posts (Not on Instagram but on other applications) because we don't follow each other on Instagram.
Plus I'm blocked everywhere partially.
I know dumpers have a relief stage but is it this soon? And how long does it last?
I'm in indefinite no contact but check the hello talk app with a fake account (Because my original account is also blocked by her there)... and just saw her post now and in deep pain again.
Is it normal to behave weird just after the breakup?
10 Opinion