I've never experienced low oestrogen / high progesterone (yet) but the pressure feeling in your body is likely to be the stimulating nature of too high oestrogen. The comment that you're about to explode is spot on for me!
However, I've heard a lot of women here talk about progesterone intolerance which I think is not the same as the level being too high (which makes you feel drowsy as it's a sedative at too high a dose), so it's another set of symptoms but I'm not sure what they are.
The timing of when you feel worse is the clearer test though, as some symptoms can be similar when either hormone is low. Taking replacement hormones tops up what's missing but also, if the other hormone has been unopposed for a long time and down regulated its receptors, it can reawaken them until they're fully opposed and symptoms can flare up quite badly. So it's not straightforward!
Trial and error (for reasonable chunks of time) seems the best way to find something that's suits you, or to ride it out without HRT until you're either getting less fluctuations to try again or feel good enough without any.