This may be odd... but I need to know!!!

So, me and my other half have had continuous sex(we are trying to get pregnant) and here in the past week I have had a lot of lower back pain(mostly in the morning), my breast are KILLING ME! And yes I’m a cigarette smoker(I know I should quite) they are starting to taste really bad. Is this normal? Are these pregnancy signs? Am I over thinking? Just wanna know yalls input.🤗