(((emre43))) - I'm sorry this is upsetting and causing you embarrassment. Don't feel embarrassed because this is a common problem. Now there's different causes of ER. There's also a specific one that comes from anxiety - can you explain what kind you have? For example there's common age related ED from lifestyle like smoking, which narrows blood vessels...hence the ED or prostate problems. Then there's emotional ED from things like anxiety...performance anxiety. There's also a less known ED from desensitization, from watching too much porn. I probably talked too much lol, so that's a mini education on the different types of ED.
Do ahead and let her know or tell your family doctor, so they can help you. If the ED from anxiety, let me know and I'll explain what can help this. This is nothing to be ashamed of and not treating this will make your anxiety worse. I hope this makes you feel more comfortable and less alone.