it's a good idea to take some antiparasitic before the flush. i also find i get a lot more worms out with a coffee enema which i use instead of the salts the next day.
i hate drinking oil too. i never really had a lot of fat in my diet before and just recently started eating more meat. i find it really helps and my body really needs the oil but the texture of it is just plain gross. so, i suggest you plug your nose and dissasociate when you drink rather then psych yourself out and tense up. if i think its gross it gets worse and i start to panic. i'm not kidding. but it's based on bad memories from childhood and when i relax i do a lot better. the nausia for me is unavoidable tho so i just get used to it and ready. it's tolerable 2xa month and definately worth it!
i also forgot to mention i used a hot water bottle this time around and found it did help me relax and take my mind off what was in my stomach! lol!