My period is expected on Monday (20th). My cycle was slightly messed up this month. Had some spotting earlier this month. It was too early for implantation bleeding but I've never had breakthrough bleeding before. I've been having some nausea and my boobs have been slightly tender but I've also had a slightly higher sex drive which has happened during my period in the past so I'm debating on whether I should buy a test tonight. I won't take it until tomorrow morning but I'm just not sure if I should bother spending the money. I'm definitely a POSA but I don't want to buy a test and get a negative and then get my period the next day. I know I should wait to see if I miss my period but its just driving me crazy!