Your dream contains several archetypal symbols relating to your preoccupations with creativity or fertility, spiritual freedom (and the fear of the loss of such freedom).
The sea represents collective unconsciousness and is both a female symbol (depth, womb-like nature), a male symbol (sea spray) and also represents the collective unconsciousness that we all try to probe by dream analysis. The furry animals also represent fertility. The house could have many meanings but in your dream it seems to represent claustrophobic, trapped feelings rather than safety, and the old man seems to be associated with fear of aging (the dragging chain) rather than wisdom or fulfilment through creativity or fertility. However, in the end the old man pulls out the chain and then you are free to go to the bathroom, a symbol of cleansing and liberation (going downstairs towards the open, rather than being trapped in the house).
If you are having pains in your waking hours then the dream is telling you to get it checked out..then hopefully the negative parts of the dream will not recur.
Sorry this is a bit lengthy but I hope it helps in some way.