You can buy omega supplements, Pregnacare and Sanatogen even do a combined vitamin with omega per-natal supplements. Other than that, Omega 3/6/9 can be found in flaxseeds and flaxseed oil, walnuts, Brazil nuts, pumpkin seeds, sunflower seeds and some dark green vegetables.
Lyra - I'm also worried if I'm lacking iron, I am so shattered at the moment, no amount of sleep seems to help. But as the MW took my bloods on Thursday, I reckon she'll let me know!