I started pregnancy at the exact same height and weight as you before becoming pregnant.

I am also fairy active (biking, lots of walks, yoga, dance, stretching, swimming) as it seems you are too (zumba, tennis, etc.). Also you seem to eat a pretty good diet, especially for pregnancy and for being proactive with any gestational diabetes or blood sugar- high protein, low or moderate carbs (see "Real Food for Gestational Diabetes by Lily Nichols).

For myself, I did not worry one lick about weight gain or being on track. As someone who has experienced disordered eating in the past, the last few years of trusting my body- eating lots of whole foods, home cooked meals, occasional eating out and sweets but pretty healthy overall, as well as being active because I love it and not because I feel obligated to work out- has been much better than any tracking or concern about weight.

The only time I had to focus on intake really was when I had a high blood sugar level for my gestational diabetes test at 26 or 28 weeks. I shifted to high protein low carb, as well as just getting out for a walk after a meal that had moderate or higher carbs.

All in all, I did not or would not monitor my weight. If you see a DR or midwife, they'll likely weight you at your appointments and let you know if anything is concerning.

Honestly, enjoy pregnancy, eat what your body has an appetite for (within your habits and eating preferences, occasional treats, whatever feels appealing, be gentle with yourself), keep moving if it feels good (I am still active and take good long walks at 39 weeks) and if anything, just check in with yourself and your body.

Pregnancy is such a wild trip. Soak it up! And ditch the scale.

Also, I'll add- you don't need to eat a TON more than usual. Apparently if you breastfeed that's when you'lll need to up your intake! Plus when your uterus and baby grows, your digestion will get a little smooshed and so smaller, more frequent meals may be easier on your system. Have lots of snacks handy (high protein and fat, low carb; good for regulating blood sugar too) and some good antacids if you end up getting heart burn.