A baby

St
From previous post: 
My fiancé and I are trying to make a baby. But because I've been on the shot (that ended last July) it has made me a little irregular. I just ended a period the end of January. But we've been trying for about 2 months now. Is it safe to use a fertility method? Or should we just wait and let my body get back to normal? I'm afraid of birth defects or any complications with the pregnancy. Any pointers or advice on this?