Infertility

I had mentioned about a month ago that my little sister is pregnant, she if course only tried about 2 months and was pregnant. Using this app. I'm over the moon happy for her but also extremely jealous. It's extremely hard to track ovulation with irregular periods and my endo. The last 3 months I have had very light pink/rust colored blood, a week before my period is even due. And my periods are only 3 days long. I try not to get excited every time thinking it is implantation bleeding. Were on month 7 of trying to convince. We have sex the entire week of ovulation. I need tips, should I see a specialist? Or just wait the full year?