Husband has had fever 100-103.7 for 6 days. Body aches, diarrhea, headache, dizziness. Time for dr?

Yes. He needs to be seen by his doctor asap. If he looks very ill, he should be seen in an er as fever, diarrhea and dizziness point to the possibility of dehydration.
Husband sick. Yes it is time to call your doctor. This could be serious so check in with your doc. I hope he is better soon.