Hello
I can really sympathise with you, you'd think being young your DH would only have to look at you and you'd fall pregnant. Unfortunately it doesn't always seem to be the case. But as you said, you've only had 4 cycles so far, and you have a 20% chance of getting pregnant each cycle, as long as you catch around the right time. Have you been charting or temping at all?
I'm 21, I have TTC previously for 8 months with no luck
I took a break and now I'm back for my first cycle this time around. Really hoping it won't be long until we see a BFP!
ETA to answer Fizzyfefe's question. I'm on CD3