My husband and I are thinking if we should just combine our baby's baptism and first birthday celebration. Do you think that will be fine?

Yes. Mas better nga po yan. Iba nga sinasabay sa fiesta. Kami we are planning isabay na din 7th birthday ng first born namin sa binyag ni second baby :) Kung hindi naman mapamahiin ang fam nyo, no problem yan. :)