I'm a rapid cycler. Since I've been on meds (about 4 years), my hypomania is pretty much non-existent and it lasts max 2 days. My depressions can last 5-10 days. 

In 2022 so far I've had more episodes, including a mixed episode, a hypomanic episode that lasted 5 days (almost manic I'd say) and now I'm currently in a mild depression that's lasted for over 2 weeks. Is it normal that the length of the episodes vary or is it a sign that Lithium might not be working so well anymore and a reason to get a pdoc appointment?