I've got PCOS and very irregular periods. Before DS was born I didn't have a period in over a yr. I had one period and then they anished again - turned out I was pregnant wih DC1 but didn't realise until 12 weeks. I had no idea I was pregnant but in hindsight was able to realise why i had felt sick, was off food and booze and thrush 
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So...
when I fell preg with dd I knew almost immediately and tested about 3 times before I got a faint line. (this 'knowing' had nothing to do with missed periods it was purely down to how i felt and the fact that i had thrush again!)
I finally got a line that dh would/could see at 4weeks+1day preg.
Two weeks ago I got thrush and started to feel a bit tired, hormonal. I had a small bleed (I mean tiny, blood in mucus type bleed TMI!). I tested last week and it was negative. This week I've started to have hightened smell and queasy. Tested this morning (£1 cheepy thing from asda!) and another negative.
I've just spent 10 mins loitering around th HPT in tescos eyeing up the first responses but left empty handed. I couldn't bring myself to spend they money on another negative!
So, any ideas? Advice. Thanks x.