Could i be pregnant?

I know it’s still too early to tell, but I missed my period for 3 days going on to 4 and I was thinking bc I’ve been so stressed out with school and family so I know that has a big affect on the body. I don’t know if I could be pregnant I’m feeling a lot of fatigue and it’s unusual, and a couple of days before I missed it my vagina discharge has increased and it’s clear as if I’m wet but I’m not. And I’m having some low abdomen cramps like pressure. I’ve been so moody, and irritable anything annoys me. But I know it could be Pms but it feels different? Like I’m not really having any? But they are there ? Women who have had children think?