With my first set I didn’t know I was pregnant until I was losing twin A. My bloods were coming back negative but my scan showed my babies. I’d felt light headed a lot and had a lot of pains but put it down to living in a fourth floor flat with no lift. With my singleton I was sick constantly from the day I took my test, with my 2nd set of twins I woke up feeling light headed and it was the day after my missed period so when I got a faint line I said straight away it was twins. They doctor said my hcg was too low for twins and I said when I come back after my scan you can apologise to me, she did. I see it!!