Another user gave great advice so I'll just offer this: try not to be hard on yourself. You are doing a
LOT and it's normal to be stressed out by these changes and commitments. Can you build in some time for self care? Even five minutes a day of something you love can help navigate these stressors.
With hugs from someone who has been there (for me, it was my second year of my PhD studies).
It aets better!