Missed period negative hpt but now having pelvic pain should I go to get a blood test or see a gyn? Also urinating and tired more often

Reasonable. None of this sounds too worrisome, however if symptoms persist it would be best for you to be checked by your doctor. Hpts are pretty reliable by the way.
Please do it. It's good to get blood checked for pregnancy to be certain . And, we need to rule out infections too.