Help please!!!

Ok lady's, my husband and I have been trying to conceive for almost 2 an a half years. we have a 4 year old little girl and she keeps asking for a sibling! We're getting a little discouraged and depressed. when I found out I was pregnant with my daughter, I found out I had wpws ( Wolff Parkinson white syndrome) had to quit caffeine. within 2 months I found out I was 4weeks pregnant. but also in that time I put my legs up after sex. never tracked my ovulation, or temp. just happened. don't know what was the cause besides the obvious. Lol. please help me!!!