Symptoms I'm confused on! Please help ladies!!

I am 17 and my partner and I are TTC. Well we had sex a few days ago and I have been feeling really moody here lately like extreme and I have been exhausted and I get plenty of sleep and I have slight cramps, and yesterday I had heart burn and nausea and in my lady part I feel like a full sensation, and I have also been kinda constipated (tmi I know lol just really need help) but none of this is normal for me. What do you think? Has this ever happened to you, if so what was the outcome? I am just confused please help?!! 😇