I'm having a problem with my first hits

Yo RIU,

So, recently everytime I take my first hit weather bong or vape I start sweating horribly and have a really strong head rush. I thought it was the strong sativa the first time, but then I went for some nice indica and same god damn thing. Am I taking too big of a hit? holding it in for too long? Or what? I usually hold in for 8 seconds I started a new breathing technique which allows me to rip a lot larger of rips, but this didn't happen right when I switched techniques like two weeks later this began and its been another two weeks.

take it slow start with smal rips till your tolerance builds up

Thats the thing have a huge tolerance, I smoke out of the volcano and my three bongs all day basically, but for some reason these first rips are making me go crazy, after the first rip and I lay in the ac for a bit I'm fine and can rip all day its just those first damn hits after a bit of a break, like sleep.