baby girl was going good for almost two days, last night she had spit up and her ox dropped. this…

baby girl was going good for almost two days, last night she had spit up and her ox dropped. this morning it took me almost 2 hrs to calm her down she was gassy and fussy. while I was in my room making phone calls, I guess her ox dropped during a feed and her lips turned blue. Dr ordered a echo of her heart, and tomorrow X-ray's of her digestive system, she was again born at 34w5d she's suppose to be 35w4d today.... is this okay for a preemie to do this? do I need to worry ? I mean will she get past this? I've called my psychologist about upping anxiety meds and antidepressant.... I've been really anxious past few days and emotional like not suicidal more like worthless