- First, I'd say none of this stuff can actually hurt you, so there's nothing much to worry about except maybe losing some sleep. I know how worrying this sort of thing can be as I have personal experience of it, too.
One factor that we've noticed quite often when we've conducted our paranormal investigations is what psychologists call 'contagion', which has nothing to do with disease but a lot to do with people infecting each other with their ideas about a thing, such as the presence of a ghost. This is the power of suggestion. Once people in a group are thinking alike then anything that happens, for example several light bulbs blowing in succession, gets put down to the ghost, rather than, say, coincidence, or an electrical power surge. I'm not saying this is what's happening in your case, it's just worth considering as a contributing factor.
Personally, I'd love to actually see a ghost. I imagine I'd be terrified of it, but really there's no reason to be. If you are lucky enough to see one, you are very privileged.
None of this is meant to trivialise your experiences, just ease anxiety.
There are (I believe, at last count) about 10,000 paranormal groups in the UK and so there will be quite a few local ones, any one of which would probably jump at the chance to do an investigation of your house. So, if you decide to call in paranormal investigators to find out what's going on, make sure you don't get crackpots! They will make things worse, not better. Chances are they'll discover a portal to Hades in your bathroom or something similarly terrifying (and inconvenient).
One way of telling if a paranormal group is crackers is if they have photos of dust orbs on their website and they proclaim them to be spiritual manifestations. (Here's some info about dust orbs, so you know what they look like: http://strangeoccurrencesparanormal.weebly.com/orbs.html )
Perhaps have a look at a couple of good UK paranormal websites. One of the best is ASSAP. The SPR (established 1882) is also reliable. Either of these would be a good place to get advice and/or look for a lead to a sensible local paranormal group, but there are many others, too.
A good paranormal group will interview you about you experiences of unexplained events and listen carefully to you. If you have a series of notes about these events, then they can systematically work through them and try hard to find natural explanations. Mediums, on the other hand, almost never do this, which is why I would recommend that a medium should not be your first port of call. I've never heard of a medium going into a reportedly haunted property and not sensing a spirit or some kind. If they're wrong, and they often are, then it's really not helpful.
You also might want to look at this advice list on our website
Please keep in touch and let me know how you get on.
This is not something we have much to do with at Strange Occurrences - we don't want to get rid of ghosts, we want to study them - but I'll write the next blog post on it anyway.