Oo, totally normal yan mama, marami sa amin ang nakaranas niyan sa first trimester! Ang excessive saliva (ptyalism) ay common during pregnancy kasi ng hormonal changes, plus kung nauseous ka, mas lumalabas ang laway dahil ang body mo aygumagawa ng protective layer sa stomach. A few of us here actually had the same issue, one friend swore na minsan mas naging worse pag umaga, at meron na talaga syang nanluluod the whole day, kaya nag-invest siya sa maraming tissue haha. Usually talagang bumabawi ito after first trimester, so fingers crossed na next month mas ok na for you!