Good afternoon! Not sure if this is the right place or not so feel free to redirect me

I am the mom of an almost 6 month old girl, conceived after 3 rounds of Clomid then 2 rounds of Clomid+IUI. I was only ever diagnosed with unexplained infertility and have very irregular cycles after going off birth control (which I was on for roughly 10 years). I am a triathlete and long distance runner but work to maintain a healthy weight/BMI. Currently I am EBF though we are starting solids and also beginning the process of weaning. We are weaning for a few reasons, one if which is that I am hoping to conceive #2 sooner rather than later. I am 34 and given how long it took with #1 we don't really want to wait and desire our children closer together. My period has not yet returned. My daughter was sleeping through the night but with some travel, a growth spurt, developmental changes and teething, not as much recently. Mostly I don't feed at night but I will when we can't soothe her back to sleep otherwise.
So, with my background in mind, our goal is definitely to conceive #2 naturally. Does anyone have any experience with a similar situation or can offer some advice? Any recommendations to help move things along? Thanks so much!!!!
Me: 34 Unexplained IF, DH: 31, no issues
3 cycles of Clomid Jan-March 2012
3x BFN
IUI #1 Sept 2012 BFN
IUI #1 Oct 2012 (10/11/12) BFP!
Beta #1 10/26 313
Beta #2 10/29 1450
Beta #3 11/1 4202
U/S #1 11/13
Baby Girl born 7/3/13!!!
And now we begin again...
RE Consult 2/25
Baseline Bloodwork and U/S 3/4
Had a 22mm follicle on the R, getting ready to O on my own...BFN
AF 4/6, CD11 testing done 4/16
3 follies right (largest 18), 1 left (11.8). Lining 7.16
starting Estrace 4/16, trigger 4/16 with IUI likely 4/18
Re: #2 naturally after IUI for #1?
IUI#2 Femara/Ovidrel (cd 5-9) = BFN
IUI#3 Femara/Ovidrel (cd 3-7) = BFP!
beta #1 11/23 = 270, P4 = 75
beta #2 11/28 = 2055
Our daughter E was born 7/29/2012!
Surprise, our 2nd daughter P was born 5/22/14!