Been told I look like I’m pregnant

So I had sex all ovulation week we have sex a lot but the thing is I started eating a lot an drinking water way more like I’m always thirsty like my boobs feel heavy an my nipples are tender an my boobs are some lower back pain and migraines I had a sharp pain in my lower abdomen last week ...I put on some weight to where my mom thinks I’m pregnant an so does my boyfriend but I took a test last Friday (3 test) all negative ...any advice or what you guys think I’m supposed to get my period in two days but my Cervical mucus(TMI) is watery an slimy