Im one day late getting cramps for over a week. could i be pregnant?

Im 19,, been with my boyfriend for 3 years and were even talking about getting engaged so i think were pretty stable.

Ive been getting cramps for about a week and a halfish now and feeling sick but not being sick. I also have really sensitive boobs but especially my nipples!!!
Im only one day late for my period but something doesntt feel right.

Im wondering do you think i could be pregnant or could it be something else??

I worked out my dates for my cycle and over my ovulation days i know me and my partner had intercourse, unprotected.

I want to do a hpt but dont want to waste money to get a negative and to then get my period in a few days.

Any advice would be soo good right now!

It could be...

Well i experienced this...
if you're worried about it then that can upset your system and delay your period.
Its not a waste of money if it makes you feel better knowing.
Tell us how you get on
p.s use protection!

The best thing...

I Think The Best Thing Is To Take A Pregnancy Test, Just To Be On The Safe Side !! Good Luck