Trying to conceive, past 1 yr or so! Some info and tips would be great! ?

Hey me and my partner have been tying to fall pregnant with no luck at all as of yet! I'm not sure what to do because I think it may have something to me not having a regular Menstrual cycle! I usually am about 5 days late each month and every now and again (bout every 4 months) I will skip my cycle for about 4weeks! Its seem to happen again to as I'm already 3.5 weeks late! Much to my anticipation I thought we was successful this time but after two home preg test I'm not preg! So any ideas! I'm going to the doctor really soon but I think my partner is embarred by this! Thanks in advance!