Unfortunately there aren't any commercially available tests for either. Pretty much unless you have active symptoms to be examined, there's no way to know if you have either. Both are viral infections and very common. the hormone changes from birthing a baby can trigger a recurrence of hpv and you could've picked up molluscum somewhere too ( it's not only sexually transmitted ).
Have you and your man sat down and talked about this? If not sit him down and say - dear you've been acting very distant lately and aren't your usual affectionate self and we really need to talk about this - and go from there. He needs to know that you've noticed his behavior and he needs to talk about it with you so you two can work thru this.
Laundry should be done with hot water and the dryer on high if this is mollscum. Washing your hands after using the bathroom is the only other precaution to take and chances are good that it's one you are already taking anyways.
hang in there - it's a lot to deal with with just having had baby recently