How im feeling

So im 4 weeks and 4 days pregnant and i know this is a lil tmi but i find my boyfriends sexy with clothes and i get in the mood but once our clothes are off i dont know i dont get turned on i think too much so i dont enjoy the sex after about 2-3 mins 😔🤦🏼‍♀️ i want to enjoy it and he is so good to me i just dont know what to do because he asks me if im ok or if its him but i dont know what to say i dont want to be mean 😔help