Am I pregnant? Anyone know much about implantation bleeding?

Hi Everyone,

Let me start with a bit of history. I have been pregnant a couple of times before and miscarried. This was in the last 3 years. Me and my husband haven't really tried for a baby in the last year or so due to the mental trauma and have got very strong emotional and physically to prepare ourselves when we are ready. However we do have unprotected sex.

I last had my period on the 2nd of August and my cycle consists of 29 days and period does not last more than 3-4 days. It is always heavy and painful. I also suffer from Hypotyrodism and am on the minimum medication as my hormones are quite balanced now.

So my period is rightfully due today. Although it has been a very weird week. My boobs usually get sore a week before my period and are fine by the week my period is due. However, my boobs have been sore and are still very very sore. I can smell everything and anything even food from the pub which is 2 blocks away! I am tired but very randy when it comes to sex..lol..

Now today I had my period or so I say.. Not much pain, very light  but I am still wearing a pad to avoid any stains etc. There are a few drops of light blood and I am confused to the max. Am I pregnant or just out of my head? By the way, I have more headaches than I usually have. Help! xxx