Omg I cant believe I put my family in a situatio. Like this :( is there ANY chance that the doctor got my weeks wrong during my iltrasound when he measured baby? Off by like 4week
if your dr did an ultrasound to get the 10 week date then the early ultrasounds are always the most accurate.
As for ovulation goes If you have a normal cycle that is about 28 days then your period would last the first 5-7 days about and then you would ovulate on day 13-15 of your cycle. That is the only time you can get pregnant during a cycle is when you ovulate. If you have sex after you ovulate chances are pretty good that you wont get pregnant. However if you have a longer cycle like 45 days then ovulation would be at a later date. It seems by what you said you normally have a cycle each month so I would assume the baby is your husbands. But if you are concerned still the only way to be 100% certain is a DNA test after the baby is born. But I highly doubt that you will need to.
You O two.weeks after your period...so seeing that your lmp was April 9th I would say It's your husbands. (Just my personal guess....)