WEIRD DREAM about my GF?

I keep having these dreams my gf is cheating on me but when I went back to sleep it got weirder. I dreamed me and my gf were being pursued by crocodiles who wanted to eat us so we climbed these big rocks and I lifted her to the very top to save her while I was still exposed somewhat to them then out of nowhere a tiger comes and tries to attack us and tries to bite me I kick it and it runs off then a crocodile bites my foot I woke up screaming and realized my foot got caught in the bed frame. My GF and I have been argueing more often about some stuff she says I don't listen to her and I feel like she's not in love with me so much anymore, why do I keep having these dreams, I haven't been able to sleep with all these night mares.