So frustrating!

So my husband and I have two children. 12 & 2. We want another child but it took us 7 years to conceive our daughter( our son is from my prior relationship) and have been TTC since we had her 2 years ago. My period is between 32-36 days. I'm on day 41 and still no AF. I took a hpt yesterday and came back negative. I was due the 9th with AF and still no sign of her ugly face. I'm really hoping she doesn't come and finally we have #3 growing. Just so irratating when you get no AF and BFN!!!!!!