Tell me what you think ....

The night before last 2:00 a.m. sleeping I felt 2 pat's or tap's on my shoulder and woke up thinking my brother who work's 3rd shift and stays up nights when he is off had came in to wake me up for some thing.
It wasnt him I went back to sleep.
Talked to rest of family next day thay say thay have seen,heard and smelled " things " and that the 2 cats and 1 dog have hissed and barked at the hall before with nothing there.
Last night brother is at work I felt a tap on my shoulder again I am not scared or freaked just ... I dont know wondering what to do if anything it just wakes me up