Took Clomid when I was overweight but had a gastric byp and been on bc pills for over a year now...?

In 2005, my husband and I got married and wanted a family right away. Unfortunately, I never had normal periods if at all (seriously, I would go years without one) and I was told it was due because I was overweight and have been all my life. We saw my ob/gyn and decided to start on Clomid so I took 2 rounds of it and charted my temps. right before I went to get my 3rd round refilled I had a follow up appt. and saw the doc. he doubted I was pregnant but to make sure we did a test in the office well, it came out a faint positive-I have no symptoms at this time in fact I didn't believe it. In Dec. 2006 we had a beautiful baby girl who is 3 yrs now. During 2008 I made the decision to have a gastric byp for my daughters sake of having a normal mom and for me to live a healthier lifestyle. I was at my heaviest at 345 pounds. Right after surgery I immediately got on bc pills and been on them for about a year and a half now..never missed any pills have had a normal period every month perfect 28 day cycle (always started the day I take the 4th green pill). Now that I have my surgeons approval and physically I'm in better shape now weighing around 174 pounds we would like to have another child. My question is this: Since I was overweight and had to take clomid to get pregnant the first time do you think I might have to take it again in order to get pregnant or was the real reason i couldn't ovulate to get pregnant was because I was overweight? I was told once I lose the weight then I should have no problem getting pregnant..well, now that I lost the weight do you think I should be able to get pregnant and ovulate normally? I'm wondering since I never had normal periods before bc pills I'm wondering if the bc pills were the reason I was having normal periods and they were chemically induced but now I've stopping the bc pills will my period continue to be normal or will it stop or get messed up again? I took a whole pack of pills as usual and had my period on Jan.6th, 2010 at the end of that week I finished my last green pill but didn't refill it..just stopped taking them. I bought ovulation kits but I'm getting neg. results...I was supossed to ovulate according to online calculators two days ago but still neg. hubby and I had on 1/15, 1/18, and 1/20 just incase the tests were wrong...my period is supossed to come on Feb.3rd, 2010. What are the chances do you think could get pregnant or even ovulated but the tests are wrong? Could I be pregnant already and the test are coming out neg because I am already pregnant therefore the LH hormone is no longer detectable once we get pregnant..????...I know this is a lot of questions but I can't find anything online even close to what I need to know...I think it's too early to call my ob/gyn (I have a new once since I lost weight so she wasn't with me on my last child). For the past two days especially today I have been having these small low pelvic twinges that come and go and I dunno if it's gas bubbles or mind tricking my body or if it's the real deal...the only time I get these is right before I have my period but my period isn't due for another week or so. So I'm looking for some insight..any help right now will be greatly appreciated....Thanks! =) Btw, if you are wondering my husband and I have been married for 5 years, have a 3 yr old daughter and I will be 28 this year and he will be 30. Just incase any of these statistics have any effects on my issue at hand. And the bc pills I have been taking is Trinessa. Thanks once again! =)