how much more fertile are you after you miscarry compared to normal cycle?

[jembaby]

i miscarried on the 8th Oct, and was told because my miscarriage was so natural and i stopped bleeding quickly and wasn't in any pain that i could try again within a week. Well me and my fiance decided we didn't want to try this month as we would Rather not have a July baby as alot of people in our families have bday's in july. As stupid as that sounds but that's just something we decided. I already have a 3 yr old and i know that there is a chance of pregnancy every time we have unprotected sex, so i don't need people telling me if i don't want to fall pregnant don't have sex because i know that. Any way caught up in the moment my fiance ejaculated inside me and i went to the toilet and then squirted water inside me and i was wondering if they would help not fall pregnant. We aren't going to be devastated if we have fallen pregnant but i just want to know if gravity and water would help prevent it