Can you get pregnant if you dont have a period?

[venomkyss]

My boyfriend and I have not been using protection as we want to have a baby. We have one already & the first time we didn't use protection, we got pregnant. I was and still am very irregular with my periods & hadn't had one in months when I became pregnant with our first child. I was on the Mirena for about 4 years when I removed it. I had thought I was pregnant right after getting it removed but now assume it was the hormonal crash after removal. Its been 3 months since I've taken it out & have still not had a period. I get the cramps, fatigue, cravings & sore boobs/nips. I've also had some nausea & heartburn.
When I start getting crampy, I make sure to have sex and lay down, but so far nothing. Could it be because I haven't been having my period?

 

[venomkyss]

I realize I didn't really make sense seeing how I got pregnant with not having a cycle with my first. I guess I just really want to know what you ladies think. I'm wondering if maybe its the b/c & just hasn't gotten out of my system yet? I'm getting impatient lol.