I need advice

Hi I'm wondering if anyone can help me. I'm very confused whether I'm pregnant or not, my body has changed a lot recently. My periods are irregular so I get them whenever, the last one I had was in august and that lasted 3 days and it wasn't that normal. For the past few weeks my body has changed, I feel  more tired, my breast have changed they are heavy and they have definitely grown; my nipples are sore and I have little bumps on the areloa bit. I always feel bloated and my stomach always feels bloated and it's hard at the bottom.

I don't have morning sickness but I do have the occasional headache. Also my mood always changes and recently I've been feeling alot more emotional I cry at everything. I did a home pregnancy test this morning but it said negative. I'm wondering if anyone can help me and give me advice on what to do as I'm really confused. Thanks