Opinions!

Sk

So me and my husband had sex 3 days after this app told me I was ovulating. Again a couple days later no protection no pullout. (Tried getting pregnant for 3 months and nothing) so thought nothing about it. I’m now going on 3 days late no symptoms flow is coming. (normally my boobs hurt) I tested yesterday just to se and it was negative. Could I be pregnant or is my body out of wack?