Hallow Dear,
You have to consider multiple things while trying for
pregnancy.
1. Even though your one tube is removed, remaining one tube is very much capable of picking up the eggs discharged from both the ovaries for conception, provided that tube is patent. I would advise you to undergo
hysterosalpingography (X-ray of the
uterus and tube after filling in radio-opaque dye) and/or
Laparoscopy to assess then patency of the tube, normalcy of the
uterine cavity (
HSG) and any adhesions in the pelvis (Laparoscopy).
2. You are having irregular menstruations. Though one test by ovulation monitoring kit has indicated ovulation, may be you are not ovulating regularly every month. You may undergo regular ovulation monitoring by
ultrasonography. This will guide you for the day of intercourse also. Further more it can find out the thickening of the uterine lining and size of the follicle when egg was released. Follicles between 18-21 mm size give best results.
3. Please get your husbands semen also examined for its quality.
4. If you have missed your period for one month, it is a good idea to get pregnancy test done on the overnight first morning urine sample.
I hope this should help you.
Dr. Nishikant