Ihad sex the 1st day ifertile he didn't cum . my boobs are kinda hard , veins poping out and there kinda sore . can iget pregnant ?

Yes: Regardless of whether he ejaculated inside you or not, if you engage in unprotected sex, you can get pregnant (and catch sexually transmitted infections). If you miss your period, take a home pregnancy test (precum contains sperm, too). If test is negative & you don't want to get pregnant, go see your doctor to discuss contraceptive options. Then make him wear a condom every time to lower sti risk.