Can systolic and diastolic readings be too close?

[Ksheo]

Can systolic and diastolic readings be too close? Can your pulse pressure be too low? Mine every now and then can be less than 20 between the two readings . . . I am really worried. I am 33 with four amazing girls who I need to be here for. The last month I have had big issues with palpitations, exhaustion, high Bp, tight chest etc. The doctors have said it's a mix of a previously diagnosed svt (I am on 2.5mg bisoprolol for) and a high stress response due to a traumatic event that happened at the same time. . . But I have felt so unwell I am worried. I have had some bloods and ecgs which came back good. I am just worried they are missing something and the close readings are a problem? Thank you in advance . . .