can stress push back ovulation?

i recently started tracking my bbt so i am a little new to this. I thOught I ovulated on the 11th like expected (bbt drop and rise) but its 2 days before af and no usual pms or other symptoms (usually tender breasts or cramping around 8 dpo) and another significant drop and rise in bbt recently! I know stress can push back af but can it alter your ovulation schedule as well? if so, did I just ovulate? SO is gone this month (military) so I am stressed about that, not expecting a pregnancy either (he left on the 6th). so will af show up 2 weeks from now instead of 2 days?