Oh dear, well there are various insect killers David, WILCO's have a potent powder to put down, or you can use aerosols. If you're
allergic to lavender oil, I'd call in professional help, the Council will have pest control. I know that turps, is a good repellent, as is
creosote, as it burns them. For the time being, I'd put all your clothes through the wash, you can also put things like suits in the
freezer to kill any eggs. I'd then keep your clothing in resealable polythene bags as you work your way through the house getting rid
of the little buggers. So I'd seal between your skirting boards and floor, lift any carpeting and vacuum between the floorboard gaps,
a question of stopping them getting in, and destroying systematically the ones that are in there. Then I'd put pesticide down to bump off
the remaining ones in your garden, check your buildings ventilators too, that's access for them. Its not just the ones crawling about, its the eggs you want rid off David, best of luck.