Pregnant?

So, I have been on birth control for about 7 or 8 months now. My boyfriend and I have been together for 5. We dont use condoms when we have sex (yes, I know we should and I'm not looking for people telling me that right now please) the last week I've felt completely off. Every time I eat I get super nauseous, my breasts/nipples are super sensitive and have been for days. . . I'm terrified I might be pregnant. I havent taken a pregnancy test because if it comes out positive I dont know what I will do. I am 21 and only half way through my college degree, my boyfriend is 31 and only now starting to get his career going. Does anyone have any tips for me? I could really use a pep talk. I dont want to talk to my boyfriend until I take the test. He already has a 3 year old daughter and I know he wants another kid but I just dont think I'm ready yet