My son recently turned a year old.
My husband and I have been having unprotected sex since December, I thought I might be pregnant once, however it turned out to be a false alarm.
My period for the past 3 months are:
May 17th, started light for 2 days, stopped then started back heavier
June 17th same thing (since my son that is normal for me)

However in July it started on the 15th, it was thick, with a little light streaks through it every other day, it stopped 2 days in which I figured it would start back, it didn't, it was just very light discharge that had little clumps of dark blood every other day, I didn't even have to use a tampon or pad until the 18th, then it stopped all together.
For the past 2-3 weeks my breasts have been sore, my husband hasn't noticed them being any bigger (They feel heavier to me) I haven't really been feeling any morning sickness unless I am in the car, which never happens, but last night the smell of cigarette smoke made me feel sick (just like my previous pregnancy)
Now, it's the 19th and my period hasn't came.
Last night and the night before I had really bad heartburn (I haven't had heartburn since I was pregnant with my son)
For the past 2 weeks I have had really bad headache's, but the past few days they have stopped.

The thing is, my breasts aren't as sore as in my first pregnancy, yes they are sore, they do itch once in a while, one morning I woke up and I was clawing at them because they was itching so bad, but they aren't as bad as before.
If I lay down the wrong way I have to move because it hurts.
I think I may be pregnant again, but I don't know if it's worth buying a HPT for, I have many times in the past and it has turned out to be a false alarm, but now, I don't know, I feel if I buy one today, it will be negative and I will get my period tomorrow.

Is it a good possibility?