heart palpitations after eating?

Rachael
So A couple of weeks ago I went into the ER because I was feeling faint and my heart seemed to be beating so intensely I could feel it throughout my entire body. I had a BP of 149/99. They said I was slightly dehydrated and just to drink more water. Well these episodes of my heart feeling this way continued to happen so I called my OB and just saw the nurse. She took my BP and said it was fine and there was no protein in my urine and sent me home. Yesterday I had to go pick up a paper and it was so awful yesterday that I started to have an anxiety attack because it was so intense. I asked the nurse and she said some women just get a lot of anxiety when they are pregnant. I was livid and left after saying thank you nicely because I know I can get upset when I'm anxious. But I still think they are dismissing something. I have dealt with anxiety and OCD since I was five years old. I know I am not having an anxiety attack every single day. And I tend to have these episodes after I eat. Does anyone know what's happening? And it's not like my heart is pumping more blood so I feel this way all the time. It's once or twice a day and it happens whether I have caffiene or not.