I had my first egg retrieval in November. Unfortunatley, our transfers were unsuccessful and we're preparing for another retrieval. I had enough Gonal F for one dose left in a pen from November. I used it the other night without even thinking much about it. Now I realize that once it's punctured it's supposed to be used within 28 days....is it okay that I used it for one dose? The expiration date on the box was January 2020 and the med looked clear when I checked before injecting. I've got myself all worried about that one dose now and can't stop thinking about it. It was day 7 of my stim meds and was only one dose. Will this effect anything? Any advice is appreciated.