i think somethings wrong ...

so I've been with my boyfriend for 4 and a half months and over been noticing some Strange things in his sleep. He keeps the Heater on like he's cold but sweats profusely i literally wake up out of my sleep ( like a mental alarm clock now ) Just to check him make sure hes breathing, take his shirt off while hes sleeping, turn the Heater off etc. , and he's wet the bed about 4 or 5 times since we've been together. Its nearly impossible to wake him out of his sleep (which is why i check his breathing) i have to almost scream his name and shake him . And even then it barely works he'll fall right back to sleep . so last night i felt the bed move and im kinda a light sleeper so l wake up and i hear him kinda moan and i see his body jerking/seizing in a way and i thought he was masturbating but he hops up and he was actually laying on his stomach . he checked the bed for urine and went to the bathroom . he came back and i asked if he was okay he said yes . i said what happened be didn't answer so i asked again and he said he didn't know laid down and went back to sleep. i just had him lay close to me and i just held him cause i was so scared. he ended up wetting the bed this morning i asked again if he's oksy he said yes i asked what happened he just brushed it off . i told him he needs to go to the doctor he said he hasn't been to the dr in a long time . but he was really stand offish during the whole 2 minute conservation so i just let it go . when somethings wrong he normally gets all quiet like he doesnt wanna talk about it but its scaring me because we are TTC and i also would go crazy if anything happened to him . Ny asvice?