Advice me Please !!!

I don’t know what to do I’m 21 years old going on 22 next month. Me and my boyfriend of 2 years decided that if I happen to get pregnant then it happens. I was on birth control but it made me sick constantly so we agreed that I can get off it in May 2019. We aren’t really planning to have kids so we usually have sex around the time my period comes or right after to minimize the chances. We are in the mist of moving and getting our own place so I feel it’s the perfect time to have a child. But I don’t want to put extra stress on him with my wants.im just really confused and would like a lil advice on what I should do far as talking to you about how I’m feeling or allowing nature to take its course.