Could I be pregnant even though I have had a period since I last had unprotected sex?

i last had unprtected sex about 3-4weeks ago, and I have had a period since then but recently in the last week or so I have been having stomach cramping every now and then, feeling sick but not actually being sick, been feel tired a lot more and also I have noticed that I have been going for a wee a lot more (i used to go frequently but to me it has got worse) the man I had unprotected sex with has a low sperm count and the doctors told him it may be rare to get someone pregnant, also a few days ago I went out and had a few drink but after my third alcoholic drink I started getting back stomach cramps, I have also noticed that the last few days I have been wanting to eat all the time, I have also been having back pains and this then causes me to feel sick depending on how bad my back is hurting, I also feel as if I am getting fatter but people are telling me that I am not, I took a pregnancy test about 3days ago and it came back negative but I still feel as if I am,

it can be possible I had my period through my whole pregnancy call ur dr or obgyn and make an appt .

"Low" sperm count is not "no" sperm count. "Rare" is not "impossible."

If "miracles" didn't happen, there wouldn't be a word for them.

Confirm whether you are or are not pregnant through a blood test at your doctor's office. Those are more accurate than urine tests.