Hi @KatetheGreat, I am sometimes drawn by the dream questions, yours is an interesting one. First, just to let you know, I have studied and recorded dreams over around 25 years now and can absolutely state the contrary to @Blackberry‘s statement. Dreams most certainly do have meaning, as do most things in life. Or perhaps it is more accurate to say that all dreams are open to interpretation, the meaning being something innately personal.
Anyway, on to your problem, I’ll try to keep it short. There are many possible interpretations of the content of your dreams, but frankly, only you know what alligators or serial killers mean to you. Your background, reading and tv/film/interest/educational history will have lodged unimaginable – literally – amounts of information in your subconscious memories. So, in order to find out more, first you must get over being afraid – it’s your mind that’s trying to get a message over! Get some sleep, ask for some clarification; @bkcunningham and @picante‘s advices are good. Talk to yourself a bit, get some idea of what you want to know.
Be prepared: I happen to believe that dreams ‘never lie’, but in fact are part of our processing of things we may find unpalatable in waking life. To this effect, a very specific interpretation is that in fact you have either a direct physical health problem, or there is something in your waking life that you cannot see, or have not yet noticed causing you threat. Not literally a ‘Serial Killer’, but a good example of something I’ve come across, might be a re-interpretation of the word – serial, try ‘cereal’, the dreaming brain loves to mix up spelling! Are you allergic to anything? Have you felt unwell, without having any idea why recently? Worth a think about, under attack may actually mean just that.
Alligators are reptiles, can represent things to do with the nervous system, can of course be related to visits to the zoo. Please do take a deep breath, relax and get a good night’s sleep. The dreaming is part of your whole being, don’t shy away from the content. What strategies did your parents/guardians use if you had a bad dream as a child? Remember the feeling of reassurance from those adults, take it to bed with you. Record your dreams on waking and think about them as you go through the day. Honesty with yourself is very likely to solve this for you. Good luck and nighty night!
apologies for length, but hopefully this could be helpful!