Drowning...I almost drowned when I was 5 and again at 15 and remember both very very clearly..so I hate when I can not see or touch bottom.
Family members dying..I am 500 miles away from all of my family..and my son was in an accident and in a coma almost 5 years ago and we didn't know if he was going to make it..I had to get to him as fast as I could with the "not knowing" (he is ok today, thank God)

Heights..general fear..and it does paralyze you when you get in certain situations..I can go up..just can't come down. I freaked out 2 years ago on a ferris wheel with my 4 year old granddaughter..and SHE was calming me down..but the WHOLE family heard about it forever..she is almost 6 now and still talks about it

Getting hit by a car..I don't know where this comes from but i think of it at least once a day...irrational fear, I think..