Can i have an ectopic pregnancy without severe pain?

Ive been bleeding on and off for the past month, at first i thought it was my period, which normally lasts 2-3 days but it just keeps coming..i have sharp pains in my lower abdominals on the right and left side, also a tightness on the left. I even have had the sharp bubbly pains in my neck and shoulder, which is a symptom of ectoptic pregnancy but only if it ruptures... But if it ruptured wouldnt i be in severe pain??? And the pain in my shoulder and neck has been coming for adout three days so wouldnt i be dead or at least super weak if it ruptured that long ago??? Oh and also ive had moments of severe lethargy and lightheadedness.....