Pregnancy symptoms?

I've not used an opk so dont know exactly when I ovulated but I had sex in my fertile window. The day after I had sex my boobs hurt, which made me think maybe I had sex on the day of ovulation which would be a good sign. I'm due on the 29th i think, based on last month although I was later last month than I have been previously.

Anyway since my estimated ovulation my breasts have swelled, my nipples have gotten larger and the have been really sore! I had prickly nipples too (never had that before) breast soreness was in my nipple area and a wee bit around the sides. I normally get sore boobs but this was so sore I couldn't lie in bed a certain way. The soreness has calmed down a wee bit now to only be tender to the touch. I've also been really exhausted throughout the day to the point where my eyes are nippy and I feel weak. I've not had this type of tiredness before. I also have had some dizzy spells but put it down to I got up too fast but its happened more than once. I've felt a few cramps on my lower left side but thought maybe it's my IBS playing up. I guess I just have to wait and see. I hope I am.