Help ladies!

So lately I’ve been having pregnancy symptoms and I’ve gone to the doctors to take a pregnancy urine test & it came out negative, I’ve also taken in home pregnancy test and they as well have came out negative but I haven’t gotten my period since early October, it wasn’t a full period it was just light spotting for 3 days. Now for the last two weeks or so I’ve been extremely nauseous & dizzy & sleepy & constipated and on top of all those symptoms I’ve been having tons of lower back pain / discomfort, I can never sleep comfortable or even lay on my back, Now I have to always sleep on my sides with tons of pillows around me so I have a gut feeling that I am pregnant but all the urine tests I take come out negative. I don’t know if I should call my doctor and make a appointment to take a blood pregnancy test just to make sure. Please ladies help me out because I don’t know what else to do!