Positive blood serum pregnancy test June 27. Urine tests still neg. Should I be concerned?

June 27? today 6/22. I think you meant 6/17? Serum pregnancy test can detect pregnancy quite a bit earlier than the urine test can... if you tested positive on 6/17 with serum, the urine test should be coming soon.. any question/concern, consult doc. Good luck.
Only problem is... ...it's not June 27 yet. Are you predicting the future? :-) Might want to edit your statement and put in the correct date. Nevertheless, while I'm not a gyn, I can tell you the blood test for hCG (the most common blood & urine test used) does turn positive in blood before urine. Also different hCG assays have different detection limits, so that must be factored in.