Really long cycles after miscarriage

hi ladies just after some advice from anyone that might have experienced the same !? I had a miscarriage which started on 30th march at 6weeks I had my first visit from AF on 1st may then had nothing until 9th July and still waiting now for the next visit has anyone else experienced the same it's really tricky to know when I'm actually fertile as there is such a big gap any thoughts would help I may try to get a doctors soon just to check x