Hi, I am 21 and have been TTC for a couple of months. My last period was on 15th October 2013 and lasted for about 4-5 days. Me and my boyfriend have had sex every other day over the past few months. Im worried because I haven't come on since this date. I have taken 2 £1 pregnancy tests and both have come out negative. I have been feeling really tired recently, spots all over my chin and fore head, been having a couple of migraines (never had them before). I occasionally get the odd cramping in my tummy thinking my period is about to begin but nothing other than white discharge. Yesterday I noticed I had some stretch marks on the side of my boobs and I could see veins going through my boobs towards my nipples. The other day I kept burping and bringing up sick but nothing coming out. Feeling bloated and constipated some days. This morning I had to wee 4/5 times and been feeling desperate for a wee for couple of days. Someone please answer