What do you think am I or aren't I?

Hello, have only been trying for a baby for a few weeks, my period was due on Monday and still no show, my breasts are a little tender and I do need the loo often (not really unusual for me, very small bladder according to my husband) andway have done 3 tests all negative except one this morning which seemed to have a very faint line if i looked at it in a certian way with the light, half of me thinks that if i was pregnant it would show by now and perhaps I am seeing what I want to see!!! The other half hopes that perhaps I caught late in my cycle and not enough HCG in system to show result yet... hoping with fingers crossed. My period has always been on time in the past except when i was pregnant!!!
Anyone ever had this and it turned out to be positive???
Praying I am what a lovely cxhristmas present it would be, also a coincidence as it was 2 days before christmas that I found out I was pregnant with my daughter 3 yrs ago.