Help ... Ttc

Hello guys I have a ? I have 2 healthy boys and me and my hubby been TTC since August I got pregnant with my other 2 within a month of trying both. But this is taking a little longer these days. I've had normal paps and everything but I have to say I had my kids back to back and my youngest will be 2 December 24 so is it just taken longer to conceive because of the time in between or just in gods timing?? I had my periods November 21-27 me and my boyfriend started trying 29 until december 5, is it a good chance that I am? I've had a mc in may