Chances of me being pregnant?

According to my fertility chart, I was most fertile from the 20th-25th of January. From the 21st-22nd of January, me and my boyfriend had a total of 3 times; in which all 3 times, he d in me. It says for me to wait until at least the 4th of February to get myself tested. But I wonder if I get tested before then, would I get a clear answer on whether or not I'm pregnant? I've been really gasy lol and I just feel very sluggish in a way...I've also been very tired. Could these be signs of pregnancy, or is it way too soon? Also, I kinda worry that my boyfriend is sterile...Because he had told me how in the past, there were a couple times he didn't use protection and his gf at the time never became pregnant :/ Could he be sterile?? If so, that saddens me...