Fertility spike?

I'm just kind of curious because I'm 19 days late on my period. I stopped having sex for 3. Months straight and then had unprotected sex with my bf (which was supposed to be the first day of my period). I'm just curious because I've been looking and can't find anything. Is it possible for the 3 months with no sex to have helped me with fertility? I'm not having ANY symptoms of a period soon, no cramps, spotting, nothing. But my stomach has felt, weird at times.