Think my body is playing tricks on me

Lakeisha

So me and my boyfriend are trying to have a baby. I already have 2 kids but he doesn’t have any. We did the deed on the last day of my cycle last month and on again on the 2nd day of ovulation. Now I’m 5dpo and suppose to start my period on the 14. I’m starting to have the my normal pms symptoms but now I’ve been nauseous (almost threw up twice at work last night) and I had some bad abdominal pain a few days ago. It’s been awhile since I’ve had a baby so not really sure on the implantation bleeding/cramps since I didn’t have them before. Has anyone else experience this