2 doctors weighed in:

After shower, pulse goes up to 100-115bpm, & i feel dizzy, tired. My head feels heavy (sinus pressure) - CBC all normal, ekg, no fever or other issues. Very dry in house, history of panic attacks.

2 doctors weighed in
Dr. Brian Rike
Emergency Medicine

In brief: Dehydration

Sounds like you could just be dehydrated make sure you are drinking plenty of liquids.
When taking a hot shower this will cause your blood vessels to dilate and can cause drop in blood pressure leading to lightheadedness and feeling dizzy. Sinus pressure or headache can be from lots of differnt reasons including sinus infection or more serious cause this may need to be addressed with your doc.

In brief: Dehydration

Sounds like you could just be dehydrated make sure you are drinking plenty of liquids.
When taking a hot shower this will cause your blood vessels to dilate and can cause drop in blood pressure leading to lightheadedness and feeling dizzy. Sinus pressure or headache can be from lots of differnt reasons including sinus infection or more serious cause this may need to be addressed with your doc.
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