Just wondering

Last time I saw my boyfriend was the end of May into the beginning of June. The first day I saw him I forgot to take my pill early and had just stopped my period a day or 2 before. I took the pill about 2-3 hours before having unprotected sex with him. Now it's August and I've woke up early throwing up 2 times since June. It isn't a lot but that NEVER happens to me. No matter how nauseous I wake up. Certain things I just don't even like the smell of. Now, I've taken 2 tests the end of last month but they both came out negative. Not to mention my mood has been allll over the place! 😳 yet I've been getting my periods but they've been only 4 days long instead of the normal 5-6. So should I get blood work done or just not worry about it?