I am genuinely terrified of cockroaches?

Does anybody find it normal that I am mortifed by the thought of cockroaches? Ever since I can remember, large cockroaches, flying or not, have been my absolute worst fear. Now, I may be a girl but I'm no sissy. I'm 19 and I have more tattoos than most adults and a few piercings too. I've undergone surgery when I was too small to even know what surgery was and I've broken my nose in a mosh pit so when it comes to most things, I guess I'm a tough cookie.. But cockroaches? Aint nobody got time for that. I am fucking terrified of them. The worst nightmares I have are of cockroaches either crawling or flying towards me. I wake up from these in a cold sweat. At night when lying in bed I hear small faint noises and often times my boyfriend has gotten up turned the lights on and looked in every single corner of the room to check if it was a cockroach because I would be too terrified to sleep. I have yet to see one since living with him for the past year yet the thought of them literally haunts the shit out of me every night when we get into bed and turn the lights off. Sometimes I have to sleep covering my ears so I don't hear noises and keep myself awake worrying if its a cockroach. I have no idea what I would do if I were to ever actually see one. It seems the more I age the worse this fear gets and its starting to affect my sleep and how much of it I actually get, as I hardly ever fall back asleep after a cockroach night mare. I can't even explain why they're so creepy to me, maybe the feelers, the wings, maybe everything, but I feel like its hindering my ability to live a normal life. There is no physical thing that scares me more than a cockroach. Several month ago at my mother's place I saw one in her bedroom and locked myself in the bathroom while her boyfriend got rid of it. Several months before that in my boyfriends cousin's room I saw one and ran out of his house across the street. Its like I don't even know what I'm doing and once I find myself far away from the threat I realise how quickly I ran away and its ridiculous. How can I be so afraid of a bug? Is this normal?