I am Merwin Meibos and I live in Holland (heerenveen). From when I was young (5/6/7 years old), I encountered a variety of ghosts. I could always see them, but I lost this ability when I reached puberty. Because of this, I lost my faith in ghosts until these new ghosts appeared in my room. I say ghosts because there were more then one (one was friendly, one was angry). I can't see either of the ghosts, but they make me really clear that they are there all the time.
The angry one makes a lot of little noises and gives me the feeling like I'm being watched all the time. These noises contain banging sounds from my gas stove, sounds like the curtains are rubbing against the wall and a really creepy scratching sound from my music boxes. These boxes aren't broken, that's for sure. I did picture this evil ghost on my digital camera. In the corner of one picture you can see something really red.
However, a month or 2 ago this angry ghost disappeared all of a sudden, or at least it doesn't make any sounds anymore. Now the friendly ghost is in my room all of the time... It's a really kind spirit and it makes me feel really relaxed. For some kind of reason, I believe it was a women.
She touches me a lot, like for example padding me on the shoulder or going through my hair with her hand. I don't mind this ghost, and I am really happy that the angry one disappeared.
All of your sounds could be explained though and should be investigated throughly. There could be any number of reasons why the sounds are happening and a countless number of them could be simple things. For example, a music box is a complex work of machinery. And while a slowed down, unwinding music box could sound creepy or make clicking sounds, that does not mean there is any spiritual involvement.
As far as your picture. There is a lot of explanations behind it. There could be something out of focus, or a malfunction with the camera, or even corrupted film. The list could go on and on and in the end, I would be willing to say I am almost positive (and comfortable saying so!) that the red blur is most likely not a ghost.
As far as a ghost just being there one day and then gone the next. I believe that. I believe a lot of spirits choose to go where they want to and do what they want to. There could have been all sorts of reasons behind why it went. Heck, the good ghost could have even chased off the bad one.
In the end you are going to have to go with your own instincts. And I wish you luck and health in the future.