Advice pls

Ok this may be tmi but me and my bf have been together 4 years and we have an amazing sex life. Always willing to try something new but I think we may have took it a little too far? He was playing down there and by time I knew it, he had his whole fist in my vag.. Btw it felt great but idk if I should be embarrassed by this or not? It's making me feel uncomfortable. Any thoughts?