First blowjob, spitting a lot?

It was my first time giving a blowjob to my so, and like later throughout the day I felt like spitting a lot. My throats feels so weird since I deep throated a little. Just know I only did this for probably like 2 minutes because I really got nervous after a while. I keep spitting in general for some reason. I'm not sure if this is normal or not. If it is, how can I ease this since it's annoying me. If it's not normal, what's going on with me? Thanks...