Ahhh, so refreshing to come on here and see I'm normal!! Been using my special pants combined with over-the-knee socks to seduce DP, works every time. We've been at it like rabbits this week, amazing, but exhausting, and slightly less fun knowing it's for a reason iyswim. Nice one floydie by the way!
Been obsessively using ovulation sticks for last 5 days, and nothing. Cycle normally 27 days, I know I definitely conceived DS on day 11, and DD2 on day 10, I'm on day 13 now and nada. Though did have a slightly darker line than on any other day yesterday. Do you think it's possible I ovulated before the sticks could detect LH? Or (after reading all your comments) are they just crap?!
xxhunnyxx I had implantation cramps with all 5 of my pregnancies, but to varying degrees, ie hardly any with 2nd, massively with 5th, and had implantation bleeding with some but not all. So in my experience it varies! I had hardly any symptoms with 3rd pregnancy until morning sickness at 7 weeks. Thought test must be wrong. But yes, period pains all but stopped after I'd had my first.
flamingo it definitely won't hurt to go to GP, as the others say they'd probaby want to see you anyway just to be sure nothing's wrong. You won't be wasting their time, but you might be wasting yours if you know what I mean - I'm 38 and very conscious of time ticking by! That sounded negative, I didn't mean it to, but if you have irregular cycles you've got more grounds to visit GP than someone who's regular, surely?
Good luck everyone, so, so good to know I'm not alone! 
PS whysoserious well done on 6lb!