When is it best to have sex....??

💙💙💗Desiree💗💙💙 • Mommy of 2 boys and 1 girl 👦👦👑👣🎀They are my everything

On day before peak day or day of or the day after? I had sex 8-6/8-11 and got my peak opk on 8-10 /8-11 but I must say I have not had my period for this month I was due for it on the 5th but never came. My man was out of town for work and didn't get back until the 6th I thought I was going to start since I was cramping a bit but she never came. So we had sex those days and now I'm wondering if there is a slight possibility of becoming pregnant from those days? I thought maybe the positive opk was due to my period wanting to show but I'm not having any signs other then very slight cramping / discomfort. So if we had sex from the 6th-11 and he finished inside those days and then had to leave again for work what are my chances? Right now is there live sperm inside still ?? I know they can live from 3 -5 days that's why I ask thanks in advance

My opks from 10th &11th