Advice needed please.

So I am 26 weeks and 1 day. For the last couple of weeks I’ve been feeling like nauseous and also at the same time having a hard time to Breath. I feel like my heart is beating 50X more. It’s so weird it’s only after I eat anything. I spoke to my dr and she said it’s part of pregnancy and yeah I know that this is my third pregnancy but it’s never been like this...does anyone else know what I’m talking about?

Update:

Thank you all for the comments! Good to know It’s normal.