TTC #1 w/ PCOS & long cycles. What to do?

I am 24 yrs old (25 next month). I have been married for 3 yrs & we are trying to concieve #1. We did end up getting pregnant last october, but it ended in a miscarriage @ 4-5 wks on 11/08/10. My cycles, ever since I stopped birth control last april have been irregular. When we got pregnant last october it was a surprise cause I was told it would be a miracle for me to get pregnant. Now that I know I am able to get pregnant, we want to start trying. My 1st period after the MC was 12/13/10 & my 2nd was 01/13/11, which made me think my cycle was gonna be 31-days. However, for my 3rd period in february, instead of having a 31-day cycle & getting my period on 02/13/11, I had a 38-day cycle & got my period on 02/20/11. For my period last month I had another 38-day cycle & got my period on 03/30/11, which lasted for about 4-5 days. We had unprotected on sunday April 3rd & according to my calculations I'm due to ovulate sometime between thursday April 21st & Saturday April 23rd. We are gonna try every other night this wk. But I have also heard it is possible to get pregnant if you have the last day of your period or the day after the last day of your period. If so, there is a possibility I could already be pregnant. I'm nauseated, feeling crampy, & I have bronchitis/cold, which is exactly what happened back in october. I began developing symptoms as soon as I conceived. Also like I said we had unprotected on the 3rd ( I was already done with my period) & by wed the 6th I started with really light spotting that lasted into thursday. My question is if I'm not already pregnant what can I do to help conceive quicker? I have PCOS & I'm guessing my cycles are 38-days, which would make the 1st day of my next period May 7th. If I don't conceive this month, what advice can you give me. Should I ask about possibly trying Clomid since we're having trouble conceiving now (we started trying again in feb). Any advice would be greatly appreciated.