Irregular period

AnnaLisa

I have an extremely irregular cycle. For instance one month I’ll bleed for 5 days twice once like a regular period and then the second very lightly for 5-7 days and some moths it’s the usual once a month. How do I go about determining my ovulation period when I have 2 periods a month? Do I even have time to ovulate in those months? Is that gonna make it harder to get pregnant? Help please!