Advice please.

Well I just found out today I'm pregnant after being 18 days late. I thought I miscarried last month (very abnormal and late period with lots of large clots) so I thought maybe my body was doing its thing trying to go back to normal. According to my last cycle I'm 7 weeks 3 days. I havent experienced any spotting at all either and I'm just kind of freaked out. I have so many emotions right now and I am beyond nervous and excited!! But also am worried that I haven't spotted? Is that normal? My breasts are sore and I'm so tired! That's about it though. This is my first child.