Well with the sanity score its about what you think you feel at different times so its quite possible for the jump. I got a score of 148 my first time and about 120 only a few days later.
Like you I think I'd benefit from talking to someone but in underage so talking to my parents is hard at its self. So that's why I turn to websites like this.

Defiantly keep look though. Maybe someone good will come up.