3 strange dreams

1)
I was a mermaid , swimming with tropical fish in the ocean . For a while , I saw my tail turn into brown , then yellow , and then became totally complexional.Suddenlly, My strange color tail disappeared ! Two legs took over my tail , and I were wearing jeans with lots of names on it . I really didn't care what happened , but I shuold be surprised or shock , shoudn't I ?

2)
All of my friends were here , on a fantastic yacht.We were drinking champagne , dancing ,talking and laughing . Symphony stopped performance , a whale appeared befored our eyes . We uses ladder to get onto the whale's back . Happy and exciting as we were , including the whale . Everyone seemed like it's old friend .

3)
I was falling into a deep deep hole , but I felt like I was flying , and I like it . I didn't know where was the hole's end . Falling for a long time , I woke up and heard my phone ringing . After finishing the conversation with my father , I fell asleep again . In this dream , I felt like I was falling , but actually I was flying .


Can anyone explaind?
Explaind what are these mean and why I can't sleep well?