Preganancy question. My pregnancy?

Hi, I have irregular periods and for the past two months it's regular. Sometimes it comes twice in a month. We have been trying to have a Baby but no luck for the past one year as we don't know to calculate the correct fertility date due to my irregular periods. Pls advise if I need to intake something to get regular periods as I can see it's normal for past 2 months. Literally I'm worried as Everytime I feel like pregnancy but tests will show negative. If I take tablets for regular periods will it affect my pregnancy ? I'm mentally worried due to irregular periods and not getting pregnant. Note: It's been irregular almost for 2 years but only it's regular for the past 2 months. My hubby lives abroad and we had sex twice in the last two months. I might again meet him next week or on August.