Thanks for posting on HCM,
The signs you have described are very unspecific to pregnancy
and the most common recognizable symptom (by most women) of pregnancy is missed period. Besides this, any other symptoms include breast soreness, nausea/vomiting
etc and very unlikely abdominal pain
especially in early pregnancy except in situations of pregnancy complications. You may have abdominal cramps/pains later on in pregnancy (braxton-hick's contractions) which are normal/natural. If you have not yet seen your period when you suppose to see after that 23rd then it is very possible that you might be pregnant but the only possible way of knowing that is through a pregnancy test (UPT or levels of beta HCG
Hope this helps and wish you luck.