I need a little help, guidance and advice.

March 2016 I ended my depo *only 1 shot* September 2016 I found out I was pregnant *💕 yaaay* so I had my son everything is great. My husband was on deployment so I didn't need to get back on. But dec 6th 2017 I did get back on depo because as we call it we didn't want to have a depolment baby! So march 6th 2017 I never went back for my *second shot* March 16th 2017 I got my first period *💕yaaay* it was my regular full 5 days. Once I got off I noticed I was a 32 Day cycle. As the time went on I became a 30-28 day cycle now for the past couple of cycles I have been a 28,30,28,27 day cycle. So I'm going back into my normal range. I have gotten all my main hormones tested. They all came back as normal *not a high normal not a low normal* just normal. Well here I am now a 11 months later still no baby 😩 why can't I conceive our second baby. My son will be 2 in 4 months so we are wanting to extend and build our family. And I don't know we can't. Hubby and I are both trying to quit cold turkey smoking out vape pen * contains nicotine*

Can anything back help? With advice?

Guidance?

What I can take? What my hubby can take?