Your weight history is around the same as mine.
I had gone up to 74.5 kilos.
It took me a long time to go down since I had been eating compulsively for years.
I did finally get even as low as 58.3 for a short while, but now I go from 59 something to over 61 at times. Up and down. Even staying at this weight is hard, and I need to deny myself a lot.
I would love to get down to and stay at 58, but it takes serious dieting and constant vigilance, and I seem to have lost my previous fervor for dieting.
The only thing I can suggest is to chalk it up to getting married, celebrating, being off the wagon, and being out of your usual routine. Then choose a date, and get right back on it.
Be thankful you're re-starting your diet at 63 something instead of 70 something. Just because you went up a little, doesn't mean you can't get down again or that its a lost cause.
Make your goal 60 at this time (58 is so difficult) and then when you get to 60, you can re-evaluate.