Pregnancy Info HOME

I just had s_x for the first time with my boyfriend on Saturday (the 16th) and now am curious as to whether I could be pregnant. My boyfriend and I had unprotected s_x because neither one of us was expecting for us to do it for the first time for awhile but he withdrew before he ejaculated but about 5 hours later we did it again and I do not remember him taking a bathroom break before hand so I know that there could have been sperm in his prec_m the second time. My last period started on July 23rd and my cycle has ranged anywhere from 28-35 days this year. That means I should have my period start somewhere between August 19th-26th. I am on day 31 right now and have been having cramps since Monday until Wednesday (haven't experienced any yet today but I just woke up so I still could have them today). I had light pink spotting on Monday and Tuesday that I only noticed when I wiped and then yesterday I had heavier brown spotting while I was at work but since I came home from work yesterday at 5 until this morning I haven't spotted. I have noticed I have had to go to the bathroom more often but don't know whether that is a coincidence or whether I have been drinking more fluids lately. I have been a little crabby but usually its when I am around other people who are crabby so I don't think I've had any mood swings or at least extreme ones.Is my spotting and lack of period so far just from stress and from having s_x the first time or is it because there is a chance that I am pregnant? I have an appointment to get on the pill and have told him that he needs to get condoms before we do it again but I'm just hoping it isn't too late!