Ay, that spotting for a month straight is really concerning, sis, kahit normal lang sometimes ang bleeding after missing an injection, yan na sobrang matagal na talaga. Definitely go see your OB as soon as you can kaya alam natin kung ano talaga ang nangyayari, whether it's just adjustment from the DPO or may iba pang dahilan. Hindi na kailangan mag-alala ng contraception muna, focus lang sa health mo ngayon, ang prolonged spotting like that needs checking talaga para ma-rule out kung walang infection or hormonal imbalance. Sending you strength, at sana ma-address agad ito ng doctor mo!