Time is ticking

The wedding is less than three months away. I am oscillating between

(a) Everything is absolutely fine and well in hand. The venue and registrar are both completely booked and paid for so a wedding will definitely happen. Our families have had Save-The-Dates and some have booked hotel rooms so guests will be there even though the proper invitations haven't gone out yet. We have the rings, my dress, and his suit. The DIY projects are on schedule for completion within the next month. The vendors are all booked, deposits are placed, timescales are sensible, and this whole thing should come off without any difficulties at all.

and

(b) PANIC! TOO LITTLE TIME!! TOO MUCH STILL TO DO!!! EVER-DECREASING TIME UNTIL W-DAY!!!! HOW THE SHUDDERING F&%K ARE WE GOING TO GET EVERYTHING SORTED OUT BY THEN?!?!?!?!?!