TTC and ovulation

Summer • Happily married, Mama of 2! 💙💗
Okay, so my husband and I have been ttc for ten months now. I have been ovulating for about three days now and we have been baby dancing a lot. I took a pregnancy test a few weeks ago and got a BFN. My AF is supposed to start 10/18 but I feel nauseous and have really bad cramps. Should I take another pregnancy test? I don't want to get my hopes up and then get another BFN. Commen below please!