Can Missed Periods, Fatigue, Increased Appetite And Sore Breasts Mean Pregnancy?

I want to ask.. I have missed 3 weeks period, go to the toilet every 15 minutes, very crappy, really tired, eat quite alot than usual, got spots on my face which I don't normally have, sore back, sore tummy and starting get sore breasts now and then. had sex without protections numbers of times since end of July. I have lost alot of weight from January to July, now no dieting at all... just take it easy.

What is your view? my husband thinks I am pregnant. I have a son aged 4, but didn't found out til I was 15 half weeks pregnant. so I don't know if I am or not.. please help?