I think I’m pregnant.

Way back in January my and my boyfriend were trying to have anal sex but it didn’t work out because only the tip got in and the condom broke. Earlier I gave him oral but I don’t think he came but I honestly don’t remember. Ever since then I haven’t gotten my period even though I get it regularly and he doesn’t think I’m pregnant, but I really think so. My breast are sensitive but I haven’t gotten bigger. Need some advice please.