Scared

So me and BF have two kids together and we both agreed to wait a few years later to try for a girl.. We had sex this past Monday.. we usually try not to have sex so early in the month, depending on when my period is.. but we couldn’t resist each other.. but days after Monday, I started to not feel myself.. I was cooking and the smell started to make me feel nauseated.. I don’t want to tell him cause it might not be true and I’m jus psyching myself out.. I’m scared to tell him and I’m scared to take a pregnancy test.. I don’t want to have anymore kids right now only because I jus had a baby in 2016 via c-section and I don’t want to have to go thru another c-section with this baby, if I’m pregnant.. But I kno I can only play the waiting game and see if I have a period this month..