Emergency Doctor visit

Well, we had to make our first emergency doctors visit yesterday... And yet, we still don't know what's wrong? I hate that. So, when we went to the doctor on the 9th, the doctor gave Serena a prescription for ear drops. Well we got the ear drops and started giving them to her on Saturday, well during the course of that day she threw up at grannys house TWICE, and when I say she threw up it looked like the excorsist. It was just shooting out. Ok, so Sunday once again during the course of this day, she threw up twice again.... I let it slide, because she did not look like she was in any discomfort, she'd be smiling laughing and playing before... then smiling laughing and playing afterwards. Well... Monday was it! Monday morning she threw up and I had to take the covers over to grannys house to wash everything... after that she fell asleep..Then later... I was sitting on the couch with her, and then all of a sudden I had to scream for daddy cause she started again! This time it got all over me, her, and the floor, I had to call the doctor they asked me if I could be there within the next 30 mins.. So OF COURSE... I forgot I had taken the car seat apart to wash everything and realized it afterwards, luckily the carseat cover was in the dryer and already dried.. I msged granny and told her so of course she ran across the street, so I had some help getting the car seat together... Sam and I ran out the door with Serena, and left granny to make sure everything was up and off... hehe Thanks Mom! Ok ok, so now on to the POINT... We got to the doctor they made us sit in the waiting room for about 30 mins, and Sam and I were like ugh, ok well if she throws up everywhere maybe they'll realize we need to see the doctor... Finally they called us we went in, and Serena has actually gained about 10 ounces since the 9th, so that was actually a relief to hear instead of her losing weight with all the vomiting. She is now 14lbs 3 oz. The doctor checked her ears no infection, didn't see anything else wrong, no fever... so she had no idea what was wrong. So we're still up in the air on it? But if it continues I think I'll run up to the ER instead and see what type of answer I get then. She said maybe reflux, but I told her it only started after the ear drops it's never happened like that before. She said it had to be a coincidence... honestly I think maybe she's allergic? So we've discontinued the drops and we're going to see what happens from there... I'm debating on switching Serena's PCP because so far this doctor isn't working for me... but we'll see...