I do agree. Those things which are typicaly found in cycle support products, they should be used 1-2 weeks prior cycle.If it were me I would consider maybe holding off on the h berry and try something with more acute effects first.
I started dosing it a week ago and my bp is up about 5%, which is typical with h berry; most people dont see benefits for at least a week.
You may be okay, but its possible the h berry will have no beneficial effect acutely. Id start off with nitrates and/or epicatechin myself, get your numbers down a bit first and alleviate your symptoms.
A good dose of Nitrates and Epicatechin would do a trick. Or just buying a good PWO such as PES HV (nitrates +++) would be even better