how to overcome the fear of pregnancy?

Hi doctor,

Last month, me and my boyfriend made out. We did not have penetrative sex, but we rubbed each other's genitals. I was not very sure if precum was present. I am a 101 % virgin, and my hymen is also intact. A week ago, I menstruated for about five to seven days. Unfortunately, it was a heavy one full of blood clots. A week after my period (probably my ovulation week), I experienced back pain and sore breasts, especially on my left side. I also feel nauseated due to the stress and anxiety brought by the pregnancy scare. Now, I am experiencing frequent urination. My feet are cold, but my body is feeling hot. My mouth is dry, and my back is aching (upper and lower). I do not feel nauseated. I am pretty sure I have a hormonal imbalance due to the acne around my chin. I was also so stressed and anxious for the past weeks because of the pregnancy scare. I am seven days before my period. Here are my questions, Am I not pregnant? Do I have a urinary tract infection? What could be the cause of the symptoms I have mentioned? Is it because of stress? Please help.