Lived in three states. Worked in 2, and am confused about what to do state-tax wise.

I lived in MO from Jan. 2019-May 2019, and D.C. (with family friends) from May 2019-Sept. 2019. During my time in D.C., I became employed in August, and paid taxes to DC during that time. In September, I moved to MD. I've lived here (in MD) from Sept. 2019 up until now. I was still paying taxes in DC up until October when my employer changed my address. My W-2 still reflects the taxes I paid living in DC. I lived in D.C. for less than 183 days and between Sept. 2019-Dec. 2019, I technically lived in MD for less than 183 days as well.

If anyone can help me out and tell me what I'm supposed to do regarding these state tax returns, it would be a huge help.