Pregnancy inner turmoil

So I’m having a little inner fight with myself. I have two kids already and I’m currently 4 days late for my period. I’ve taken 2 pregnancy tests, one on missed day one and today and they were both negative. The thing that’s bothering me is I’m having symptoms like I had when I was prego with my other two. Sore breasts, my cervix is firm and closed and super emotional. Thinking of making an appointment with my doctor to get a blood test just to be sure because I’m that unsure about the neg tests. Also I might add I am always regular.