So I really need help. Has this happened to any one and ended up PG?

So my last regular cycle was May 30 - June 5 it was heavy like normal about 4 tampons a day. Then on June 22 I had very very light bleeding when I wiped it was pinkish/red didn't even need a pantie liner nothing. I been so tired sleeping up to 15 hours a day just so sleepy, throwing up, nausea, headaches, mild cramping not like period cramps, increased appetite, sore breasts, urinating more even if it's just small amounts. I am now 22 days late. If I am pregnant I would be about 8 weeks now. I took 3 hpt that came out positive but went to the doctor and blood test and urine test was negitive. What could be wrong with me? Am I pregnant or not??? So worried. Has any one ever gone threw this and ended up pregnant?