Hello there. I am happy to help you figure out the days that you are ovulating.
I think the most important thing is to keep track of the number of days between your periods. If you are regular that will make it much easier. You will ovulate half way between the period you just had and the one that you are expecting. IF you have your periods every 28 days then this means that you will ovulate on the 14th day. Remember that if the number of days between periods is different then this day will be different also.
It is also important to pay attention to your body and to the secretions that your body produces. During ovulation your cervix will produce a wet, almost watery fluid. When the levels of Estrogen are dominant, this is when you ovulate and when the fluid is thin and watery. As Progesterone levels rise the fluid becomes drier and rather sticky, within two weeks you will start your period. You can see how paying attention to these signs can give you a good idea of when you are most fertile. You will have about a 5 day window of opportunity when you can get pregnant. It is a matter of paying attention to what is going on with your body.
Basal body temperatures indicates ovulation AFTER it has occurred and requires charting temperatures for several months to see a developing pattern. You can find information about this on the net and it would be too long for me to try to explain it here.
There are changes in your cervix that coincide with the cervical fluid that I mentioned. Unless you are familair with how to touch your cervix this would also be a bit complicated to explain here. Write to me if you want me to explain.
I think that the best thing for you to do would be to figure out your most fertile days based on the pattern of your periods, number of days between periods. Figure out what day you are most likely to ovulate and try to make love the day before, during and after. This should give you a good chance of conceiving. Before ovulation is a slightly better chance because the cervical fluid will help the sperm to live longer and to reach the egg more quickly. This gives them a better chance to fertilize the egg. If they get there too late the egg is no longer viable. It is only viable for 12 to 24 hours after being released.
I hope I have answered your question and if I have not or if you would like more information on anything I have mentioned feel free to write to me.
Take care and good luck honey. Have fun trying! Babies should be conceived in joy and love.
Lady Trinity~ p.s. I would love to talk to you about those two positive tests that you had! Weird!
Pregnancy counseling and a great deal of experience.