Possible pregnancy?? Long paragraph sorry!!

Ok so we have been ttc for 2 months now. We just started after losing our son back in march of this year at 16 weeks. This month we used ovulation tests and am now 4dpo, I had veryyyyy subtle cramps on and off the first and second day after ovulation and nothing since. I have dry heaved twice while at work and both times all I was was just hungry and yesterday I sat on the couch for about 3 hours feeling nauseous. And ever since the last day of ovulation Iv been feeling fatigue even though I get a full 8 hours or more a night. 2 days ago I had one slice of pizza and halfway through I got severe heartburn and couldn't even finish eating and it lasted about 30 minutes and slowly went away. Just now I had 3 tiny pieces of Chinese sweet and sour chicken and started feeling the heartburn again so i stopped eating. And not to mention all day yesterday I had a hard time eating and didn't eat much. Iv been having more headaches lately and the last 2 days Iv been having creamy white cm and last night had stringy white cm. Iv also been burping and farting a lot more( also had in my first pregnancy). I ovulated late in my cycle and glow changed my period date so idk when my actual period is supposed to show. Taking a test on Monday (actual date period was supposed to start) but I just wanted to ask this and see if anyone could give me some opinions and also let me know if anyone experienced these and had been pregnant??