I have taken letoval 2.5 mg tabs from 3rd day of my periods. After that on day 11 my egg size is 23�21 doctor injected me hcg 5k units of brand sifasi aqua. On day 13 I have ovulated and intercourse for 5 days. From day 19 to day 24 I had pain in my lower abdomen. Back pain. And now its day 27 today little nipple pain mild and little back pain. What's the reason. And when to check pregnancy by urine in prega news which costs of 50rs.