What's the best way to know if my high happy and low sad is bipolar or depression with good and bad days?

How high & how low?: The highs are often associated with other sxs like ^ energy, rapid thoughts& speech, ^ productive behavior, poor impulse control, flight of ideas, lack of sleep ECT with mania. The lows are associated with sxs like changes in sleep or appetite, v self esteem, v concentration, v memory, lack of joy, low energy level etc. So bipolar sxs/ depression are not just moods - it is a constellation of sxs.