Hi yall!

I sorta kinda need some help..my partner and i are planning on having our first child..im 28 and still super irregular..due to some health issues i cannot drink “the pill” in order to regulate my period..my last period started on dec 21st...stopped the 26th...and i just happened to start bleeding again on the 23th of january..currently still on my period...i really suck ar counting days n what not i googled several other methods but still pretty unclear to me...how do you guys do it if ur irregular? Some people told me to have sex 3 to 5 days after my period..thats when i ovulate..”supposedly “..ztried it last month..clearly didnt work..but i guess it doesnt happen so fast? 🤦🏻‍♀️🤷🏻‍♀️😫 help