scared of first time is all,,,when you wake up with that morning hard on,tell her to hop abord!,,you will both have some fun,and you will get over that first time jitters,,,just an idea
As long as you are waking up most days with an erection, your organs are working properly, besides the evidence that you gain an erection during foreplay. Performance anxiety may be involved here, along with some anxiety over the possibilities of having a baby before you both planned on having one. For the present, you could continue to enjoy an extended foreplay. Do you ever find success orally? If so, you could also continue with that until your psychological issues subside.