I'm not jumping into any hasty conclusions or some sort, but I can't help but think that I might be developing some early signs of mental illnesses such as dementia or alzheimer. 

I keep growing forgetful of a lot of things and it's been like that for a while now. I just kept thinking to myself that my short term memory loss was due to my poor sleep quality/schedule but now I think it might be more than that?

For instance, one minute I'm telling a story to someone and the next I completely forget about the rest of it and it usually takes me a while to get back on it (we're talking about a few days) 
Or when I walk around town and I instantly forget where a certain place is even though I've been there before and quite often at that. I just blamed it on my poor sense of orientation so far. 

Sometimes I even walk around the house with things in my hands I don't even know what I was planning on doing with them, and it goes for a while unnoticed. 

I also often need my friends around to indicate me a location despite the fact that deep down I know how to get there but I just can't seem to remember how, like it's a huge brain fart. 

I don't know much about my family history regarding mental illnesses but I did hear that it plays a role when it comes to diagnosis. 

Anyway, what are your thoughts on this? Am I just paranoid or is this worth being concerned about?