re: In Vitro Fertilization with Unknown Sperm Donor

It's really embarrassing.

My advice for OP is as follows:

1. Stop talking negative about yourself. Especially in public, but also to your wife and DEFINITELY to yourself in your head.

2. Start doing stretches or pilates every day for a month. There are plenty of YT videos for free. Start with a mere 10 minutes per day. I promise you if you stick to this for just 2 weeks it will cease being a chore and you'll voluntarily amp it up on your own. Logical progression would be hitting 12 to 16k steps per day and then lifting weights within 2 months. But it would all start with 2 weeks of stretching / pilates.

3. Get on a low carb diet and start taking at least 50 MG of zinc per day with breakfast.