Preseed - Yes or No?

Ashley • I`m 34 and a SAHM to our 3 1/2 yr old son. TTC for 15 months and now Baby GIRL is due October 14th!!!!
DH and I are TTC on our own for 2 more cycles, and if we don't have success my OBGYN wants me to do two rounds of BC to "reset" before trying Clomid. (I have very mild case if PCOS.)  so I feel like I only have two more tries and I'm wondering if preseed would be worth trying. Any advice?