I have found bulbs that have been overlooked in the past. Plant them - now! They will flower, albeit a bit later than it says on the packet. But they should perform for the spring season - but will wither if you keep them unplanted.
Best advice after flowering is to dead-head them and then to give them a good foliar feed and allow the foliage to die down naturally. Then lift and dry the bulbs (if you can't leave them where they are) and remember to plant them at a more appropriate time in the autumn!
Oh, and if you lift them and store for next season - it's quite a good idea to remove dried foliage and pop the bulbs into old tights/stockings and hang them up somewhere cool - the air can circulate, and they're out of the way in a cool garage, for example. And don't forget to label them. (If you can't remember the name, then label them as "pink/med. height/April" for example). You may think you'll remember what they were. But then, you may have a better memory than I have . . . . .