Please help!

Period is usually unregular, but it's not more than 3 days late usually. it's 4 days late now.

took a pregnancy test (clear blue plus) said no, that was today.

still no period, and it seems like I am bloated or something. Have the tummy pooch thing going on. when I try to suck it in, it's still kind of there.

there may be a chance that pre cum might have gotten me pregnant, me and bf weren't be so safe a couple times. He always pulled out, and well before actually cumming, but I get the whole precum thing.

I am freaking out right now because I hate being uncertain!

Should I try another test int he morning? would it make a difference? should I go to the doctors? 

ANY ADVICE WOULD BE AMAZING.

thank you