TTC baby #2

Libby

So when I have a LH Surge am I suppose to have sex anytime during that time frame when the ovulation lines are the darkest??? I’m new to using ovulation tests and I really want my second baby because I’m having some cancer issues and scared they will take my motherhood so trying to have baby #2 before things go that route help! Tell me some other things i can do to help me get pregnant