Could I still be pregnant ?

So I’m on my eighth day past when I was supposed to get my period, last period was April 1st, but I been having ALL period like symptoms along with cramping the first week of May but stopped, sore nipples, headaches , lower back pain, bloating , heartburn at night time, fatigue ect. & still no bleeding . I did take a clear blue digital test a couple days ago and it was negative , took a cheap test yesterday at the doctors office but she barely waited a minute for results, quickly threw it away & told me it was negative. Not sure what to think because I can tell something is definitely off. I did have sex the whole month of April even thru ovulation period using only pull out method & not on any birth control. Could I still be pregnant ? Or would it have definitely showed up positive by now ?