My explanation was pretty unclear mixing multiple things, sorry for that. Meditation itself doesn’t consume energy, but it increases the activity of my senses which I don’t control.
I think you are right. I’ve been trying to micromanage the process after I read somewhere that chakra openings should be from bottom-up and not top-down. I might be building some hidden stress by focusing on the fact that everything hasn’t been happening in the same order as explained on internet 
I guess the main thing is that I’m finally opening blockages. I’ve been meditating several years but only now I can actually feel and see the changes.
I’ve been using chakra meditation, focusing on each energy centre one by one and imagining the energy flowing and circulating to the same direction in all chakras. I’ve also used quite a lot meditation techniques by Joe Dispenza.
Makes perfect sense. Could it be so that my physical body isn’t yet fully adapted to changes in the qi body? And I’m consciously fighting back subconscious, or rather trying to reason and control everything.
Hmm, my conscious aims to “control” everything might actually be a root problem here.
I’ve used several methods shared here, and they have been super helpful! I haven’t been sensing external “additional” entities anymore, but I’m really careful especially when contacting spirit guides. I was told in a dream that there are some less intelligent parasites interested, but they keep their distance as long as I keep good hygiene.
Must recommend to other beginners too: This sigil shared by @DarkestKnight has worked very well too by keeping unwanted spirits away.
Again, now this really seems to be my main problem. So I’ll continue with meditation, adding some breathing exercises (I actually remember just recently seeing this pore breathing technique -posting!) and trying to let go of my control & letting the higher self take more lead. It must be exhausting too that I’m constantly fighting and resisting myself