What E dose were you on before?
You can for sure increase P if you'd like to. I am on 300mg continuous orally (with a 5 day break to bleed) and I even increase to 400mg for the last week, because it helps sleep and I'm on a very high E dose. Which is all to say - no worries about taking more P if you want to.
With the E, it's funny because I also got this early on when I first started HRT. I would get high BP events (very fit and never had this before in my life) and a racing heart especially at night. I actually turned out to need a lot MORE E, not less. I spent ages cutting up patches and thinking I was very sensitive to E and needed less of it etc, but really I think I wasn't taking enough. (I tried stopping all HRT and this continued.) However, I do know it is hard to get yourself to increase when you feel things are getting worse every time you increase...
You could try splitting the difference - so if you were on 50 before and 75 now, try 62.5. If you have 75 patches, you will need to measure a few mm and cut it off the patch. As long as you are consistent with what you cut off with each one, you should be fine. You can also get your bloods done on day 3 of your cycle to see if you are absorbing the E. Your own E will be lowest then and it will give you a clue as to whether you are on too high a dose or not. Really you want to aim for about 450pmol from HRT, some women need higher. And you could also try switching to the gel, just because sometimes a different form of E is absorbed differently and helps.... 75 patch is 3 pumps of Oestrogel.