nexplanon problems

Every month gives me nightmares becuase I don't know exactly what pms is I'm bloated feeling sleepy a lot and. Nauseous but stomach acidy and one hell of a back ache my bc keeps making things late and I freak out but after my freak out I have my friend, but the real question is, my partner doesnt do his business inside plus I'm on nexplanon is there any chance of pregnancy, sorry I have a lot of anxiety about these things ever since my son was born