Advice PLEASE?! Am I crazy?!

**I am 16 I have a boyfriend of a year (he is 18) and we're sexually active... A few months ago there was a time when we didn't use a condom at first but then did. A few weeks later my period was late and when I told him we decided we were goimg to wait a week and if it still hadn't come on I would take an at home test and we would ho from there. Well during that week we would talk about what if there is a baby inside of me? Yes we were both scared as hell and No we did not want me to have a baby atleast not yet. But we had to except and understand the possiblity so we talked about what would would need to be done if I was and things like that and during that time agin yes I was really scared and didn't want to be a teen mom but when that week was over and I hadn't gotten my period We took a test but when it came back negitave I was upset like sad I had fallen in love with the "possible" but nonexistent baby inside of me.. I feel crazy for that but soon kind of let it go but it's now April and we are in the same situation there is a possibility I am but my period dosent start for a few days but we had unpretected sex while I was obvulating.. And you did "cum" but he pulled out but when I happens I was so scared because it was litterally last second he said he did in time but I'm so scared but also again am

Happy like if I am.. But I DON'T want to be pregnant not now.. Not for a looong time... What is wrong with me?!