Well, I'm a girl so I can't help you penis pain, but I have read reports of men finding larvae in semen, and if they can invade the uterus, in addition to other organs such as liver, pancreas, lungs, etc., then anything is possible. But it could just mean that other areas of congestion, like the liver, or bladder, or just intestinal swelling, is pressing on areas, causing pain in that area.
The thing is, that if you are getting them out, then it's working. They will not exit unless dead, and they don't die easily.
I wonder about the gas and noises, and general upset myself. I don't think it is so much them "moving around", but rather they ball up, creating pockets of gas, causing gurgling and inflammation. Your digestive system tries to work whether it's loaded with worms or not.
The garlic can cause that brutal die off. It takes more than one day though. It does not matter what method you choose, but that is definately a worm, so just keep hitting them. It's not fun, and you may feel worse before you feel better. As to what kind......normal medical reports state that
Ascaris Lumbricoides are not that big. What do they know. I also think the long thin ones could be the intestines of the worm, rather than a worm. If you look up "Ascaris discection", you will see what I mean.
I can only provide my experiences, and my thoughts on the subject based on those experiences, and almost 3 yrs of researching and studying the experiences of others and everything ever written on the subject.