Pre chimothrapy anxiety

First of all sorry if My english's not that good but i need help. I've been diagnosed of Classic Hodgkin Lymphoma, besides that psichologically i've been really fine, i'm also havinf synthoms of what i guess is anxiety:

Belly ache, headache and recently a taquicardia (idk how to say it in english, but it's when ur heart is really fast, so fast that it hurts).

I need to know if someone had similar experiences, please🙏