I'm afraid to call my girlfriend because i'm scared of being annoying. how do I fix this?

My girlfriend and I used to text all the time, and we would usually ask one another if we could call before we did. Now I'm in the part of my relationship where I don't hear from her for a long time and she sometimes doesn't see my texts at all. I still wanna talk to her but I'm afraid of bugging her or being annoying. I lack self-confidence and always need some form of reassurance before I do stuff. I'm afraid to call out of the blue.

I'm afraid to call my girlfriend because i'm scared of being annoying. how do I fix this?
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