Pregnancy symptoms but no pregnancy?

So im ttc with my boyfriend and he believes he cannot have kids, which I believe that is only Gods will, so I always have it in my mind as I want to be because I do and I always have that state of mine (what if I am) I literally think about it everyday. My periods are jacked up but every month if they aren't on time they are a day or two off. So I just go by my mucus during the month, I feel like its me but I already have two children of my own. But other than this, I always have symptoms except this month is crazier than others, this month I've had a lot of mucus daily, I spotted when we had sex last (the other night) (wasn't fertile I don't think) but we did try the week I was. So that confused me? Now im mildly constipated, Im always super tired I use to wake up around 6-8am and stay up with no nap, now im waking up around 11am and taking a nap with my children after lunch time? And if I take a test I know it will be negative but why the spotting and so tired? Does anyone know?