AF late, but no BFP?

Haylee • My husband and I are in our first month TTC and hoping for the best!
Hi everyone, I am new to all of this and in need of some advice. My husband and I are in our first month TTC and as of today, AF is 3 days late. I usually start on the day I'm expecting it, and at the most if I am late, it's only by 1 day. I am having some pregnancy symptoms, but pregnancy and PMS symptoms are so similar, it's hard to differentiate the two! I'm have some mild cramping or an occasional "twinge" feeling. I am very tired, I'm sleeping a lot longer than I normally would. And the odd symptom for me is sensitive nipples. This is the strange one, I don't get that as a PMS symptom! I have taken 2 First Response pregnancy tests and they have both come back as a BFN. I took one on Sunday 3-12 and another one today 3-15. Both tests were taken with my first morning urine. I'm wondering if there is another brand or type of test I should be getting. Digital? Clear blue? And how long should I wait before testing again if AF doesn't show up? I'm trying so hard not to get my hopes up right now. I know the odds of getting pregnant on the first try is slim. However if I'm not pregnant, this is just a cruel joke on mother natures part!!