Hello, I Have Irregular Periods But My Cycle Is Always

Hello, I have irregular periods but my cycle is always about 33 days, longest cycle was 37 days. I still haven't gotten my period and it's been 44 days... I have been having a running nose, my lower back does hurt here & there but then again, I do have scoliosis. My breasts don't feel so tender and my boyfriend says my nipples look the same as always, I agree. I did take a pregnancy test about 3 days ago, came out negative, but I don't know if it was possibly too early. I am going to take another next week. Thing is, I usually get signs of my period's arrival before hand, such as cramping, and bloating & heavy discharge, but I haven't gotten any of those symptoms. I did feel a quick cramp in my pelvic area earlier but it never happened again. I'm worried. Did I take my pregnancy test too early? When should I see a doctor? When should I take another pregnancy test? I took an online quiz to see if there is a possibility of me being pregnant & it said I have a high chance of being pregnant. Please help.