Congratulations on 30 days.
I'm almost 3 months sober and it does get better. Though still there are days that I feel exactly like you wrote - what is happening with me days.
For me sobering is like going up in a down moving escelator - I constantly have to put effort to be ahead and not drift down to the bottom and have a drink.
I take energy from the good days and seek actively support on the bad days - therapy, AA, exercise and talking with other sobering people helps me.