I like you are 26, knew my husband 5 yr before we married ankd 3yrs later is suffering from extreme guilt and anxiety. Just one thing...5 minutes after we married I was pregnant. And 5 months after delivering became pregnant again. Theres nothing I have not been through or wouldn't understand. But one thing I do want to make clear is the most important thing is you! It's hard work and takes time, patience and support which fortunately you have but you can't help but question, how long can they be the support you desperately need. Thats enough to scare you but don't let it. You'll only make it worse. Try very hard to be positive even if you don't feel like it. It's not easy but try, for you and for your husband who clearly loves you. With therapy you will be guided but only you can control it!
One thing I would stress to you is the importance of getting well before starting a family. If one person could learn from my experiance, I would be grateful cause your issues now are only magnified during and possibly after pregnancy. It sucks the joy out of what should be the happiest time of your life. I have so much experiance, understanding and not to mention some things in common with you. I hope I can help you with what ever support you need. We all make mistakes so no one has thr right to judge you. You're only human.

Sincerely