How do you know if your moods are changing because your meds are finally working or your swinging from a depression into a mixed or manic episode?

My situation in short....for the last two month I have been in the deepest depression I have ever been in. I was hospitalized for a week for suicidal intentions and was even put on Adderall which is a stimulant just to get out of bed for a few hours a day. But I think Im going into a mixed episode. Im needing less sleep and having the racing thoughts but it only happens when Im trying to go to sleep at night. I cant blame it on the Adderall because it wears off by 6:00 at night and I go to bed at 10:00. I have had one mixed episode and it was pure hell. I just dont have much experience with this and the sudden change in my mood is really freaking me out. Any input would be great, Thanks!