My dad was diagnosed with stage 4 cancer 1 month before he died. He died on April 23. We live with my parents so to my kids, it was like losing their own dad. My mom and dad had been married for over 30 years! I totally understand what you are going through.
We ended up taking 3 short trips to Disney in July. I know its a few months after he died, but still really soon. It truly was something my mom needed to just get away. She brought the shirt he died in with us and she took a picture of it in the park at different spots - she looked funny doing it - but it was something necessary for her to begin healing. She also took a short few nights on a hotel on the beach by herself and took pictures of the shirt there. My dad was a beach bum - surfer, fisherman, just completely at home at the beach kinda guy. It helped mom with the healing to just be there - she felt close to him.
Maybe in a week or 2, take some time to get away by yourself and spend some time wherever you feel closest to your hubby. HUGS!!!! Do what you need to do to take care of yourself. Involve family as much as possible to help you.