Late period, negative test.

My cycle usually last about 34 days. I've been ttc since June,after coming off of lessina bc, I've had unprotected sex with my husband almost everyday of my cycle and during my fertile window, and I was due for my period yesterday or today and it isn't here. I took a test four days ago and it was negative, I took another today and negative. I was pregnant once before in late 2013 and I miscarried at seven weeks,I knew right away I was pregnant and I tested positive at my doctor the next day, so when should I test again and any other advice?