I had a dream....

So here lately my mind has been wandering and last night I had 3 separate dreams that me and my s.o. were having a🤰🏻 boy. Well my work has been so slow and he tells me he has a feeling I’m going to get hired at this other place we applied at today and when he has a feeling of something happening it happens. My lower back hurts my breasts have been sensitive along with some nausea in the mornings....anyone else feel this way? How did you know you were pregnant??