Dreams are usually weird and absurd. It may have some definite meaning or may be vague. Dream analysis is very interesting branch of psychology and requires much more details for analysis. What you are having, is called anxiety dreams. It may be result of stress and anxiety (as I said detail analysis require lot of other information from your present and past life). You need to get relaxed. Even if you feel that you are relaxed, probably you are not, subconsciously. Start doing relaxation exercises like Savasan, Makrasan, Progressive muscle relaxation, self-hypnosis etc before going to bed. Bhramri pranayam and omkar can also help you. You may listen to light music while going for a sleep.Your sun sign has nothing to do with it.