Pregnancy Scares

So I am on BC been on it since July of last year and I have been switching brands a lot but I recently started a new brand and I am on my 2nd pack....I'm starting my period next week but these past 2 days I feel so off I'm tired, shaky, just feeling off. So I took a pregnancy test last night that came back negative and I took one this morning that came back negative. I took one because I am a very paranoid person and I over think EVERYTHING. And the reason I took a pregnancy test was because my breast were hurting alittle not a lot to were I am complaining. NO I don't feel nauseous or sick but I have just been very tired. I have been stressed because my mother is in the hosptial and I got laid off my job so everything is on me at once. My body does ache and I was having chills lastnight but I know I am getting sick because my boyfriend is sick as well and I have been around him lately. I do feel my period is about to start because I am breaking out and usually my legs get numb around this time of the month which was happening yesterday. Should I worry or just relax?