Too tired to do anything & eating so much w/ getting full

Me & my boyfriend are TTC still, we've been having sex like crazy. For about 3 weeks now I have been eating everything & not getting full. Im not sure if it's because at one point I couldn't eat much now my appetite has came back so im super hungry or im just pregnant.I could eat a big meal & still need to snack on something afterwards, then when im finished eating everything including the snack i am still hungry but wayyy too tired to do anything else so I go to sleep. I have been sleeping & eating so much im starting to think im prego, not only that but I feel pregnant. I have the mood swings , bloating ,nausea sometimes & I think my areolas are getting darker. I could be just wanting to be pregnant so bad im imagining these things but for sure I am experiencing most of them. I sleep so much I was wondering if it is okay to sleep so much like I don't wanna be lazy but I am extremely tired most of the time.