So sorry for the late reply, this forum can be pretty slow, so sometimes threads get missed.
I'm so glad you figured out what was going on! And, thanks so much for updating your thread, that's helpful for people who may come accross it at a later date.
Happy Holidays!
For anyone that finds this in their searches, it turns out that I actually have Postural Orthostatic Tachycardia Syndrome (POTS). Autonomic testing showed a drop in blood pressure after eating which cause these symptoms!