Can Irregular Periods Cause Problem To Conceive?

hi

my name is michelle,im 29 years old,i have a problem wuth my womb,the doctor said i have infectoin,he gave a cream,since then im trying to have a babyb but its not working ,this month of february i had my period on the 4th,then again i have my period on the 23rd,i only have sex once a month,is that affecting not having sex.i realy wana have a baby,last i had pregnant for 3 weeks,i had a miscourage,please help

thank you