Trying to merge calendars from my iPhone to my iCloud. Deleted all of my calendars. HELP!

I was trying to merge my calendars from my iPhone to my iCloud. It deleted all of my calendars on my iPhone. Gone. Nowhere to be found. Not on my iPhone. Not on icloud.com. No where. I have a PC, so they weren't on my laptop either. HELP! I had so many important appointments on there!! I do not have a recent enough backup either. PLEASE PLEASE HELP!