Honey, you probably aren't pregnant, but there's no sense in freaking out until you find out. If you had your period on the 17th, you should be ok to take the test. There are tests that you can buy over the counter that can test before you miss your period.
We have to get you stabilized in your depression and I am talking to you like a Mom now - with BP - we can't use sex to make us feel better. I have tried that, too, and it's hard to not want SOMETHING to make us feel alive. That extra stress of worrying isn't going to help your depression. If you love your boyfriend and want to have a child with him, unprotected sex is fine (not to even mention the risks of STD), but if not, make sure that he uses a condom... ok, enough preaching to you. ...
Don't worry until you have something to worry about - go get a test. When I got pregnant (unmarried) at 20, the test was taken 2 weeks after I had sex and it was positive. That was a gazillion years ago so they have to be better now. If you are - don't freak out - if you aren't be more careful next time.
AND, if you are, don't avoid talking to your parents. Man, I didn't tell my Mom until I was poking out there... big mistake.
Let me know if you need to talk.
Symtoms can't start until the baby implants since symptoms are direct result of hcg in your system which isn't created until implantation. Implantation usually happens about 7-10 days after conception. Even at implantation levels are so low that most symptoms don't start occurring until right before a positive pregnancy test. Morning sickness doesn't occur until at least 6+ weeks since levels have to be pretty high. Most of the times "symtoms" are the same as before a period comes. I know that a lot of times I worry about pregnancy because I get symptoms that I think only happened with pregnancy but it isn't the case. There are a million people on this forum that will swear they are pregnant because of their symptoms and then not be.
I am in the same boat is you. It is too early to take a test, need to wait until it;s closer to when you are supposed to get your period. I will say, however, that it is possible to show symptoms as early as a few days after having sex. I had a miscarriage before and I also have a son ... with both pregnancies I started feeling off and having "flu-like" symptoms within five days of having sex. And with my son, I conceived the day after my period ended. Everyone ovulates a different times of the month, and if you are irregular then that date can change. I actually had my last period the same dates as you, and had sex the same times, and have been having "flu-like" symptoms, so I am wondering if I am pregnant to. The only difference with me is, he pulled out the first time, and the second time we stopped having sex, he put a condom on, and we continued. However, he told me later that he has a lot of precum, and I am not on the pill or anything right now.
I don't know if you want a pregnancy, but I wish you the best of luck with whatever happens. Just know that we are in the same boat, it might make you feel better to know you aren't alone.
You could have every symptom in the book and it could either be pregnancy or not be pregnancy. It may be a little early to be getting those symptoms if you are indeed pregnant. Also, if you have a normal 28 say cycle you wouldn't usually be ovulating until about 14 days after the start of your period. The chances of ovulating at the end of your period are very slim. Wait maybe a week and retest. A pregnancy test should be accurate 2-3 weeks after the day of conception.