Shortness of breath, been experiencing it for 2 days. no chest pain or other pains. should i consider this serious?

Don't take lightly: Unfortunately with limited history, the possibilities for your shortness of breath are still quite broad, encompassing issues both benign and life-threatening. I would encourage you to seek an evaluation sooner rather than later and ASAP if your are coughing up blood, develop chest pain, develop shortness of breath with limited activity or at rest.