I don't think this is brain cancer but I wasn't sure where else to put this. I hope someone on here can help me!

For the last couple of weeks I have been experiencing a very weird feeling in the right side of my head. It feels like someone has turned the bass up on a stereo really loud but there's no volume, and its the quick "bump bump bump" feeling....sort of like a rumbling feeling not just near my ear but also above and in front of my right ear. Some days I don't feel anything at all, but other days it happens a lot. It usually only lasts for between 5 and 20 seconds, and it's not like an ear infection because I can move my head any which way and it won't cause anything to happen, and I don't feel dizzy although I do wake up with headaches often but I think they may just be sinus headaches. The weird feeling/sound occurs just out of the blue, when I'm laying down, when I'm at my desk on the computer, when I'm driving, etc. I went to my doctor last week about it who said he had no idea what it could be and suggested I just write down every time it happens and let him know if it improves. But it's really starting to worry me.

Also, one of the other things occuring before I went to the doctor was that I was having little tremors in different body parts, my right thigh, my arm, my lower stomach...it felt as though someone put a vibrating cellphone up against me (if that makes sense). My doctor say to keep note of when that happens too, and since the DR visit it's only happened maybe 3 or 4 times total, but the thing in my head happened the day before yesterday and it was on and off all day long, at least 50-60 times (i kept a tally of when it happened). It doesn't totally mess up my concentration however it still really worries me, as it just doesn't seem like this should happening.

Does anybody on here know what might be causing this?