Could I be pregnant?

My husband and I are determined that this is our month! We miscarried at 12 weeks in January and just want a baby do bad. My ovulation weeknwas may 9-15. My period isnt supposed to start until may 28. Right now I just notice more white in my nipples and maybe a few extra bumps around the areola. Maybe is false hope. Do I have to wait until after I miss my period? Could I find out sooner ??