spotting brown and no period

Analía
We went to our fertility clinic and got tested and thank god everything is ok. So our doctor mentioned for us to try to conceive naturally. I'm 37 yrs and this would be our 1st baby, so we decided to go to Greece to celebrate. We had planty of sex and I was ovulating at the time. 
I was suppose to get my period on the 29 of June. I had all the symptoms of my period. But when I was a day late i decided to take a pregnancy test and it was negative. But now it's been a week and I'm having brown spotting and no period, I took another pregnancy yesterday and it's was negative again. 
Should I go see my doctor?