Pregnancy scare

My hormones have been messed up since I gave birth in January. But I just started having a funny taste in my mouth and now I’m afraid I’m pregnant. Ugggh I’m not on birth control and we had sex a few days before my ovulation. Well my app says I would have ovulated two days after we had sex but since my prolactin has been high and progesterone low it’s no way to know when I actually ovulated. I’m stressed.