Hi. I'm 19 years old and very concerned because I feel like I might be pregnant. I am on the pill and me and my boyfriend have never used a second form of contraception. I had my last period in the second week of February and I know that in the beginning of March I missed 2 days of pills because I lost my pack. me and my boyfriend had sex before and after I missed the pills. A week later I had bleeding that I thought was my period but it only lasted less than two days. since the beginning of March I've had a lot of symptoms. I always feel nausea and bloated. my breasts are sore, my lower back has been hurting, I always have headaches, and I've been overwhelmingly tired even evn sleeping 10 hours at a time. I've taken 3 home pregnancy tests and they've all been negative even though I'm like 2 weeks late. could it be all in my head or is there a chance I could be pregnant and should I see a doctor?