Thank you for your response. Your dream is giving insight into your desire to move on elsewhere at work. There are several key details in this dream to look at, and we'll dig into them a little here. If getting into too many personal details becomes uncomfortable we can always take this interpretation off forum with the premium service if necessary.
You are a nurse, so you are probably more accustomed to stress and 'running' than some others would be. So first we see your father and daughter. Three generations. They are running with you, and dad has the luggage. That's baggage. Good thing is, at one point, you leave them behind. The 'wedding' concept can stem from your line of work, your commitment. One other thing to notice here is you are also wearing a navy blue pea coat. This speaks to your profession, and timing (issue or solution takes place when it's cold out). Motels are temporary places of rest. This echoes your brief stay at your current department in the hospital.
You stated several people from work were present at the wedding, bad mouthing you, and your choice (the groom) (could speak to your choice of career, now or where you want to move on to). These people were coming out to see your fail. Do you feel this way with your coworkers? Is your environment such that there are people you know that want to see you fail?
Then there's the groom. This could possibly represent where you are trying to go career-wise. Notice you get the same thought again- venue is not prepared. The groom tells you, in essence, - you are not prepared.
I'll pause here to ask, are you a spiritual woman? In Christianity, the bridegroom is a representation of Christ. If this is your belief, please take it as Him gently saying you may not be ready for whatever it is you're trying to do. Another good point to note here is, notice the wedding is not called off, only postponed, to give you time to prepare. :-)
Later, you HEAR (not see) derogatory statements. This is probably a level of self doubt. We tend to be hard on ourselves, but I'm pretty sure you don't think you are stupid.
The next scene is in the desert. Dry places. Places of no refreshing, no rest. This can still be speaking to where you are currently. Or, it can be speaking to how you may feel in multiple areas of your life. You said the hand shaped cactus had no needles. The spines on cacti are for their protection. You don't want to find yourself in a dry place with no protection! What's more, when the hand opened, flies and bugs came out. Flies feed off garbage.
At this point, since you are the dreamer, you can identify what this dream is speaking to better than anyone. But, it appears to be regarding your career. It is up to you to decide if the cactus represents your current position, moving into another position, or if it represents something else to you (financial, relationship, spiritual).
I hope this insight is helpful for you. If you have any questions please feel free to ask. Sweet Dreams!