Why does being sick make anxiety worse?

I'm sick.. going on the third time in five weeks!
This is ridiculous..

Not sure if it's just the common cold, or the start of a sinus infection..
My forehead hurts, and eyes..

I've been getting some palpitations ( I think ), or it just felt like it when I woke up in the middle of the night randomly.. who knows.. My heart rate is up into the 80s, which happened last time I was sick.. i'm not even going to check my BP, cause ill freak when it comes up high ( due to being sick, but doesn't matter to my brain apparently ) so heres to avoiding that today..

I feel so gassy, so it makes my chest feel all funny.. my muscles in my chest are "vibrating" , I can think of the correct word, but god forbid I remember how to spell it, haha.

and my anxiety is trying to wiggle its way into my life today,

but I keep saying my "positive mantras"

"your heart rate is high, because you don't feel good"
" you may be getting the heart palpitations because you don't feel good"
"your BP would be high because of the cold/infection. so if you check it don't freak"
"your stomach is also still messed up, so that isn't helping the palpitations"
"the cardiologist said your heart is fine, he, if anyone, knows what he's talking about"
"try to relax and make yourself better, instead of letting your anxiety come over you and make you even more sick"

Thanks! (:

Thanks!!

I got myself so worked up over my BP being 122/89 HR 107, that I almost literally made myself sick!! I'm now sitting on the couch doing some deep breathing exercises!

Thank you. The breathing exercises worked! Even the horrible shoulder/neck pain I've been having all day has lessened! Twice in the last week I haven't had to turn to my medication to make the attack go away! Which is a big deal to me.