TTC Confused and hopeless pls share some advice

I have regular periods with regular ovulation. I have no issues with my cycle at all I am struggling to conceive we have been testing ovulation for a whole year now before then we were just having unprotected intercourse. The doctors just telling me to keep trying however one doctor has told me to get a blood test done which I haven’t had time to book. It’s the 21 day one. I have been taking folic acid for months. Has anyone else been in this situation? Does stress impact conception? please can you give me some advice I’m feeling so horrible

Thank you xx