well, if that's your pressure when you say it is spiking, that's not high enough for a doc to generally get alarmed about - unless you were normally much lower. Say, if you went from 90/60 to 145/90, then the change is great.
But if you don't have a monitor, how do you know your BP spikes after meals?
I would be concerned if I were you, too. Have you tried the DASH diet, which you can read online?