Hypochondriac or early Pregnancy Symptoms

I am TTC month 4 I used BC pills for one month and stopped Mid Oct 2011 and Had AF Oct 22. Then AF was on Nov 23, Dec 25 and last Jan 23 . I recently found out I have been OV 2 times every other month. So I have a chance for twins G-d willing. AF is due to come the 21-24. I have been using OPK and they seem to be working great?. Until this month, ever since the 8th I have gotten a positive every day. I have know Idea what that means .I have been having several pregnancy symptoms but sometimes I feel like I am being a hypochondriac because I really want my BFP. I am always so sure I am pregnant until AF comes. So I OV on the 4th and the 8th and starting on the 12th I have been so sleepy and on the 14 I woke up at 1 pm, My breast are heavy my knee and ankle hurts only when I first get up, I am constipated, been feeling sick all day...The list goes on! All I wanted to eat was potatoes so I did. I am taking vitamin E,B, beta carotene, fish oil, iron and prenatal vitamins . I know it seems a little over kill but because I OV 2 times every other month and may have twins I would need extra.. Could all of this be early pregnancy symptoms ? Dear G-d I hope so! Am I the only one feeling like this? Any comment helps I just need to relax and share my thoughts. Please G-d let AF pass!

Blessings all
Helena03