Irregular bleeding

Annette • Just got my bfp with our rainbow baby 🌈
Does anyone else have problems with this? I have my period, then a week later I bleed for a couple of days, then i have another period a week later. Then bleed lightly 2 weeks later. There's no pattern each month.  We are ttc and I never know when I'm fertile as my periods are all over the place. Please need advice feeling pretty low.