Hope am not pregnant... AGAIN

Last night me and my husband had sex and he finished in me. We have a 3 month old baby. Am really not trying to get pregnant no time soon. According to glow yesterday was my highest percentage of getting pregnant. So do you guys think I will miss a period this month coming up? What's a good birthday control? I really want to use condoms but they make my area itch so I think I might be allergic to the material made out of the condom. Do they have any condoms for people that are very sensitive down there?