 [ Symptoms ] lower back pain be a sign of pregnancy my lower right side of my back right above my hip it is a constant dull pain but with sharp intense bursts periodically i am a day late on my period right now took a test that showed negative could i still be pregnant [ Disease ] it could be i know it was for me my first pregnancy early i developed horrible horrible pain in my lower back which can be mistaken for sciatica but i am pretty sure it was my si joint with my second one week after conception pre pregnancy test i started feeling my back in that spot i told my husband i was pregnant and he did not believe me but sure enough lol btw  icing my back helped