Long Term type one diabetics on shots

I have been on one injection for 4 years with my diabetes and have not had a problem, a1c was between 4.8 and 5.5… i suppose you could call it the honeymoon phase… however this year i turned 19 and i feel that no matter how much i exercise and try to do everything right i’m having these random spikes in my blood sugar over 200 when i do not even eat… my doctor has always told me that i don’t need the pump because of my great hold on the disease and how little insulin i was taking… but now it seems as if its coming back on me and i need multiple daily injections… I am also insulin sensitive which is even more confusing. So i’m thinking of getting the pump… however I am wondering if anyone has managed their diabetes well on just injections for most of their lives?