BC: How long until it's out of my system?

So, long story short, I was on the Depo shot for almost 2 and 1/2 years, and was tired of not having the relief of a period, hated the weight gain, and the mood swings, so I switched to the pill, sprintec, and was on it for about 2 years also. I stopped taking the pill, since my husband and I are TTC, starting about a week and a half ago. (Of actually trying) I stopped taking the pill about 2 and 1/2 weeks I believe ago, and already had my withdraw bleed. (Regular period of 5 days, 2 days stopped in between, then 5 more days of bleeding. And now it's been 4 days of no bleeding) we've had sex for the last 4 days consistently, and he has insemenated everytime. I should start ovulating in a few days, but I already feel bloated, cramps, and frequently urinating. I don't feel sick, but I'm extra moody. Could I be pregnant already? And how long does it normally take for the BC to be out of my system? We just a family so bad, and I think I'm just overstressing everything.. Please help!