Too much vitamin B can cause high blood pressure. From the Mayo Clinic:
Use cautiously in people with high blood pressure, as high blood pressure following intravenous (IV) administration of hydrocobalamin has been reported.
I know certain medications can cause hypertension (Fanapta I think can?) I haven’t heard of any of the ones you’re on causing it but it is very possible, yes.
It is not possible to provide quantifiable advice without first having access to the ingredient/nutritional label of each product and knowledge of your dosing schedule. However, I can echo what was said regarding Vitamin B complexes. A lot of the metabolic processes that B vitamins support contribute to LHPA axis mechanisms including modulating Sympathetic and Parasympathetic tone. If the adrenals become overstimulated as a result, this can increase blood pressure and heart rate.
For the most part, however, as far as the supplements go, you should have a net result of vasodilation over vasoconstriction , so if blood flow is indeed being restricted by something you are taking, then I’d be looking at the pharmaceuticals first and foremost and seeking professional guidance for such advice on how to proceed.