If by “dizzy”, you mean that within 1h from the application you have spacey feelings, then it means that you were taking too much. If that’s the case, reduce the dose. Or, do you mean “brain fog”? And if so, when do you have brain fog? Too high pregnenolone can cause ACTH suppression within 2h (due to conversion to cortisol) and can cause lower pregnenolone than that you had to start with. But, if this is the case, your brain fog should improve at some point between the application and the ACTH suppression.
Interesting, I had a similar experience. It was working really well for every single side effects and then, after a week, I ran out of it and I didn’t tale it for 1 full day. Although I re-introduced it, all my side effects were back (except brain fog): insomnia, high heart rate, low libido, fatigue. The reason was that the increase of cortisol caused by pregnenolone made me run out of thyroid hormones and, therefore, left me with high cortisol but low thyroid hormones. But I don’t want to digress from the main point I want to make in this thread, which is that pregnenolone should help with brain fog.