My boyfriend and I had intercourse last Oct. 20 and my last period was last Dec. 1 until Dec. 6. That 5-day menstrual flow is not my regular thing since I usually have mine in 30 days period every 3 months. Yes. I only got my period every 3 months with a 30 day duration. When we had our intercourse, we usually do not use any method other than withdrawal. I think, 2 weeks after we did it, I felt dizzy thrice a week but not the usual dizziness where one lose consciousness, it's just like the feeling of my blood went down to my feet. Then, nov. 6 I had a sore breasts and my nipples get dark when the environment is cold. I also got severe gas problems where I really burp every 7 seconds or less though, I really have this one everyday but it's just since nov. 6 when it got worse. There are also brown discharge from Nov. 6 until Nov. 30. Then on December 1, I had my period. It's my normal period on it's first 3 days because I usually have a heavy one. But suddenly, it stopped on the 5th day. And now, I notice my areolas getting darker when the environment is cold but no pain. I also look pale most often from my hands to my lips to my eyes. And my nails sometimes turned into purplish. Another thing, I can also feel full in my lower abdomen just after my period and I don't know but my abdomen really looks bulgy for me with its focus on the center. Could I be pregnant given all those scenarios?
I think that it's really a high possibility for you to be pregnant. I'm sorry for being personal but withdrawal in general is one of the most unreliable methods of contraception Very many couples had problems with accidental pregnancy because of using it, if you don't want to have children in the near future, maybe it's better to choose a safer one?
Symptoms you described in your message look really like the pregnant ones, did you use any tests for checking yourself? But don't use cheap store ones, from my own experience I can say that they're really bad in getting correct results. From your dates I can say that it's already a perfect time for testing but use for this only the ones with the best sensitivity like New Choice for example. And mornings is the best time during the day for checking yourself.
Also in case of symptoms you can test yourself with a help of an online one https://pregnancytest-online.com/ too, some of them are really effective as an addition to other tests and gynecologists recommend them rather often for using too.
And in my opinion you should also make a visit to your doctor, maybe a blood test will be necessary in your case too.
Lets be scientific here.
1) Do a urine pregnancy test - If it is negative you are not pregnant. If it is positive you may be pregnant so do the prenatal care - prenatal vitamins, stop drinking alcohol/smoking, go to the doctor to switch any medications you are taking to non teratogenic ones.
2) Go to the doc to get a more accurate understanding of your pregnancy status - maybe get a HcG blood test and ultrasound to see if there is actually a pregnancy. The doctor will also check your vagina for a bluish hue and it sounds like your symptoms are consistent with a pregnancy