trying very hard to get pregnant! Could these be symptoms?

just put it out there, because this is going to play huge role in the getting pregnant... I'm a 23 year old recovering heroin addict. I've been clean for about 2&a half months now. I just recently got married this past Saturdayand my husband and I are trying very hard for a baby. I have an ovulation calculator on my phone that we have been using. We tried on all but two days of ovulation week. I've been done ovulating for about 4 days now. The day after my last day of ovulation there was like three little drops of blood when I wiped and that was it. Could that have been implantation bleeding? Then last night out of nowhere I woke up with a really bad cramps. And had very bad diarrhea. This morning when I woke up it was the same thing. So far I haven't had any more. I've been doing a lot of research on this and it says that you could have diarrhea and cramping during implantation. Do you always bleed when the egg is implanting?please please give me any information you have. We want this so so bad. And I'm very very scared that I can't have a baby because of my addiction even though I'm in recovery now. My only hope is that I'm young enough that I didn't mess my body up too bad. My period has been normal since I've gotten clean so I'm hoping that's a good sign. I'm not supposed to start my period until the 27th. So I still have what feels like an eternity to wait!