I'm overly tired. I'm drinking more than usual..

My periods are on a 30/31 days and lasting 5 days. My last normal period was on Feb. 15th. My partner and I had sex March 1-7 (and days after that)
I'm overly tired. I'm drinking more than usual. My breasts are a little more sensitive than normal and are achy and heavy, also bigger. They have loads of veins running through my nipple/areola. My moods are a little out of character. I eat and then 30 minutes later want more food. I'm waking with headaches. I get nauseous with too much movement and after meals. I'm getting small cramps here and there but not period like cramps. I spotted March 15th which isn't normal for me. I never spot. I bled on the 16th but was lighter than my normal period and spotted after my period.