Hi, I Started Taking Lo Lo Estrogen Fe Birth Control

Hi, I started taking Lo Lo Estrogen Fe birth control on a Monday and took the last pill on a Friday because I started to feel pain under my underarms. Like a mild burning and just pain under my arms. My right arm also started to feel like the achy feeling you get after you get a shot. It felt like that all over my right arm. Is this normal? I stopped taking the pills after five days because I was afraid. I never really take medicine and I've never been on birth control. I'm 26 and I just had my second baby four months ago. I had my first child 16 months ago