I'll be honest with you.....Yes they will be drastically affected. Purely because you will have very, very little time for them. The baby, unfortunately for all, will arrive just as they start finding their feet and NEED far more mental stimulation, training, exercise, etc....and yes they will probably need MORE supervision and input at this age, especially as you have two of them.
You situation isn't impossible but you MUST have some sort of plan ready for once the baby arrives, or else within weeks your world will collapse round your ears. You WILL be shattered after the baby is born, probably for several weeks or months, what with your recovery, both hormonal and physical, plus the lack of decent sleep. So you will really need help with the pups. You will need someone to be able to train and take them out individually, as if they are constantly together, they will form an alliance and no one else will matter....Litter Siblings, or even dogs of a similar age kept together in "normal" circumstances, all too easily become Nightmare Dogs. So in your case you really have to get them under control and have them individually respecting and obeying you now, before it is too late.
Can I ask....Did the breeder who sold you two pups KNOW you were pregnant? As if they did, I'm disgusted. It isn't advisable to sell two pups to any inexperienced owner, let alone a prenant one :roll: .
Sorry if none of this is what you wanted to hear but it is best you hear it now, as you can start making plans and getting help before it is too late.