Am I going crazy

I feel like I'm going crazy every month I feel like I'm pregnant but this month I really think I am. Iv had really sore boobs and nipples for the last 2 weeks and have been so tired I feel like I need a sleep at lunch time every day, but when in go to bed at night I find it so hard to sleep coz my brain won't stop thinking. I have also been feeling sick and have been having back pain during the night and waking up really thirsty. I really hope this is the month.