I had unprotected sex within the week of my period, i checked my cm and it's just liquidy, can i get pregnant?

Yes: Any time you have unprotected (no condom/birth control) sex you can become pregnant. This is especially true if this is one to two week before your period since this is the time when your ovaries ovulate (release an egg). Ovulation occurs midway during your menstrual cycle. When we are helping women get pregnant we tell them to try get pregnant during the midpoint of their menstrual cycle.