No, not mad Worrywart. It is pretty normal to feel so utterly bereft and lost after all that you have been through.
Any support, every support and validation you can get will help you through these early most difficult of days.
This does pass, its not possible to stay at this level, but any contact now would reinforce tgose bonds that tie again, so keeping away and blocking, although painful, will get you through it the quickest.
These are very hard and bitter pills to swallow, tye reality that he can just simply move on without a backward glance. Its normal to needtme to recover, to give your emotions time to move on. Not with an abuser. An abuser did not care enough in the first place to establish deep connections with another.
Its all more proof of who he really is and the way he has treated you.
I am so sorry you are suffering this way, others on here have suffered, are suffering, the same.
Please know that you are not alone in this.
Warmest wishes
TS