Blocked Fallopian tubes

Has anyone had experience with blocked Fallopian tubes? I've been TTC for 6 months. I'm super regular (right on track with my <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> for periods and ovulation) but no positive yet. So I'm ovulating, and we're having sex all throughout my window, so I don't understand what might be wrong. I have a history of endo so I'm afraid I may have some blockages. Any advice for next steps or someone who's had a similar situation?