Ay, this is confusing talaga, spot bleeding can throw you off! Since you had spotting in early March but then missed your period in mid-March, best thing is to take a pregnancy test now or go see your OB para sure na, kasi ang timing ay pwedeng mag-indicate ng maraming things, at mas maayos kung alam ninyo agad. A few of us mums went through similar worry din, at ang doctor agad nag-clear ng doubts namin in minutes lang, so hindi na kami nag-stress pa. Sending you calm energy!